# Boeing Alert Requirements Bulletin DC10-53A184 RB: No revision named

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### Page 1

Commercial
Airplanes
DC10
Requirements Bulletin
ALERT
Number: DC10-53A184 RB
Original Issue: February 06, 2020
ATA System: 5314
SUBJECT: FUSELAGE - Center Fuselage Main Frame - Overwing Floor Beams - Inspection
Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15
CFR 300-774). An export license may be required before it is used for development, production or use by foreign
persons from specific countries. The controller of this data has the individual responsibility to abide by all export
laws.
9E991ECCN:
Copyright © 2020 Boeing.
Unpublished Work. All Rights Reserved.
Treatment of this document and its content is governed by contract with Boeing. Rights to use this document
are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The
Boeing Company.
Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner,
BBJ, DC-8, DC-9, DC-10, KC-10, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, Poseidon and
Boeing liveries are all trademarks owned by The Boeing Company; and no trademark license is granted in
connection with this document unless provided in writing by Boeing.
Original Issue: February 06, 2020
DC10-53A184 RB
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4.0

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Table of Contents
1 . E F F E C T I V I T Y  ................................................ 5
A. Airplanes ................................................ 5
B . S p a r e s  A f f e c t e d  ............................................ 8
2. CONCURRENT REQUIREMENTS ..................................... 8
3 . C O M P L I A N C E  ................................................ 8
4. APPROVAL ................................................ 1 2
5. ACCOMPLISHMENT INSTRUCTIONS .................................. 1 3
A. General Information ......................................... 1 3
B. Work Instructions ........................................... 1 4
FIGURE 1: LEFT SIDE - GENERAL VISUAL INSPECTION OF THE OVERWING FLOOR BEAMS . . 21
FIGURE 2: RIGHT SIDE - GENERAL VISUAL INSPECTION OF THE OVERWING  FLOOR BEAMS . 23
FIGURE 3: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECT ION OF THE OVERWING
FLOOR BEAMS ........................................ 2 5
FIGURE 4: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS ........................................ 3 5
FIGURE 5: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECT ION OF THE OVERWING
FLOOR BEAM SUPPORTS [Group 1] ............................ 4 5
FIGURE 6: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAM SUPPORTS [Group 1] ............................ 5 1
FIGURE 7: LEFT SIDE - DETAILED INSPECTION OF OVERWING FLOOR BEAM  SUPPORTS [Group 2]
.................................................. 5 7
FIGURE 8: RIGHT SIDE - DETAILED INSPECTION OF OVERWING FLOOR BEA M SUPPORTS [Group
2 ]  ................................................ 6 0
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Commercial
Airplanes
DC10
Requirements Bulletin
ALERT
Number: DC10-53A184 RB
Original Issue: February 06, 2020
ATA System: 5314
SUBJECT: FUSELAGE - Center Fuselage Main Frame - Overwing Floor Beams - Inspection
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN
PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS DOCUMENT
TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE
NEW OWNER. THIS IS AN ENHANCED REQUIRED FOR COMPLIANCE DOCUMENT. THE BOEING
PROCESSES USED TO CREATE THE SERVICE BULLETIN (SB) AND THE REQUIREMENTS BULLETIN
(RB) ENSURE THAT THE INFORMATION BETWEEN "RC START" AND "RC END" IN THE SB ARE IDENTICAL
TO THE INFORMATION IN THE SAME SECTIONS (COMPLIANCE, WORK INSTRUCTIONS…) OF THE RB
WHICH THE SB REFERS TO AS THE RELATED DOCUMENT.
1. Effectivity
A. Airplanes
This bulletin is applicable to DC-10-10, DC-10-15, DC-10-30, DC-10-40, DC-10-10F, DC-10-30F,
DC-10-40F, DC-10-30F (KC-10A), DC-10-30F (KDC-10), MD-10-10F, MD-10-30F Airplane(s), line
number(s) 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45-49, 50-59, 60-69, 70-79,
80-89, 90-99, 100-109, 110-119, 120-129, 130-139, 140-149, 150-159, 160-169, 170-179, 180-189,
190-199, 200-209, 210-219, 220-229, 230-239, 240-249, 250-259, 260-269, 270-279, 280-289,
290-299, 300-309, 310-319, 320-329, 330-339, 340-349, 350-359, 360-369, 370-379, 380-389,
390-399, 400-409, 410-419, 420-429, 430-439, 440-446 in 2 Group(s). Where the effectivity is
presented with hyphens between line numbers, the airplane applicability means "through" and
"inclusive", e.g. line numbers 1-9 means line numbers 1 through 9 inclusive.
DESCRIPTIONCONFIGURATIONGROUP
Floor beam support stanchion not rod end type: Series 10 and 15-1
Floor beam support stanchion rod end type: Series 30 and 40-2
Airplane Models:
DC-10-10, DC-10-10F, DC-10-15, DC-10-30, DC-10-30F, DC-10-30F (KC-10A), DC-10-30F
(KDC-10), DC-10-40, DC-10-40F, MD-10-10F, MD-10-30F
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GroupFuselage Number
11
12
13
14
15
16
17
18
19
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
228
129
130
131
132
133
GroupFuselage Number
134
135
236
137
138
139
140
141
142
143
144
145
246
147
148
149
150
151
152
253
154
155
156
257
158
159
260
161
162
263
164
165
266
GroupFuselage Number
167
168
269
170
271
172
273
174
275
176
277
178
279
180
281
282
183
284
285
186
287
288
189
290
291
192
293
294
195
296
297
198
299
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GroupFuselage Number
2100
1101
2102 - 103
1104
2105 - 106
1107
2108 - 109
2110 - 111
1112
2113 - 117
1118 - 119
2120 - 129
2130 - 137
1138 - 139
1140
2141
1142
2143
1144 - 145
2146 - 147
1148
2149
2150 - 152
1153 - 155
2156 - 159
2160 - 161
1162 - 163
2164 - 168
1169
2170 - 172
1173
2174 - 176
1177
GroupFuselage Number
2178 - 179
2180 - 189
2190
1191
2192 - 193
1194
2195 - 197
1198
2199
2200 - 202
1203
2204
1205
2206
1207 - 209
1210
2211 - 219
2220 - 221
1222
2223 - 229
2230 - 239
2240 - 246
1247
2248
1249
1250 - 252
2253 - 259
2260 - 268
1269
1270 - 273
2274 - 279
2280 - 282
1283
GroupFuselage Number
2284
1285
2286 - 289
2290 - 293
1294
2295
1296 - 298
2299
2300 - 306
1307
2308
1309
2310 - 317
1318 - 319
2320
1321 - 323
2324 - 329
2330 - 339
2340 - 343
1344
2345
1346 - 347
2348 - 349
2350
1351
2352
1353
2354 - 356
1357 - 358
2359
2360 - 361
1362
2363 - 364
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GroupFuselage Number
1365
2366 - 369
2370 - 371
1372
2373
GroupFuselage Number
1374
2375 - 378
1379
2380 - 389
2390 - 399
GroupFuselage Number
2400 - 409
2410 - 419
2420 - 429
2430 - 439
2440 - 446
B. Spares Affected
None.
2. CONCURRENT REQUIREMENTS
None.
3. COMPLIANCE
The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to
Requirements Bulletin DC10-53A184 RB. The Airworthiness Directive will make the compliance tasks and
times given in Requirements Bulletin DC10-53A184 RB mandatory.
Accomplish the required action(s), based on the applicable condition(s) in Table(s) 1 and 2, in accordance
with the Accomplishment Instructions.
When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When
more than one ACTION is given for a CONDITION or an OPTION, do all of the ACTION numbers for that
CONDITION or OPTION.
Group 1:
Table 1: ETHF Inspection of the Overwing Floor Beams and Supports, Left and Right Sides
Repeat Interval
(Not to Exceed,
Whichever Oc-
curs First)
Compliance Time (Whichever Occurs
Later)
ActionCondition
-Within 1,990 flight
cycles or within 27
months, after the
original issue date
of Requirements
Bulletin DC10-
53A184 RB,
whichever occurs
first.
Before 20,000 total
flight cycles.
Do a General Visual Inspec-
tion of the overwing floor
beams for any repair.
ALL AIR-
PLANES
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Group 1:
Table 1: ETHF Inspection of the Overwing Floor Beams and Supports, Left and Right Sides
Repeat Interval
(Not to Exceed,
Whichever Oc-
curs First)
Compliance Time (Whichever Occurs
Later)
ActionCondition
-Before further flight.CONDITION 1 (ACTION 1):
Contact The Boeing Company
for alternative inspection(s) to
Requirements Bulletin DC10-
53A184 RB, incorporate the
inspection(s) into the mainte-
nance programs and do the
inspection(s) at the times
specified by Boeing.
CONDITION 1:
ANY REPAIR
FOUND
-Before further flight.CONDITION 1 (ACTION 2):
Do ETHF Inspections of the
overwing floor beams and
supports at any unrepaired
areas, for any crack.
-Before further flight.CONDITION 1.1 (ACTION 1):
Contact The Boeing Company
for repair instructions and do
the repair.
CONDITION 1.1:
ANY CRACK
FOUND
6040 Flight Cycles
or 121 months.
-CONDITION 1.1 (ACTION 2):
Repeat ETHF Inspections of
the overwing floor beams and
supports at any unrepaired
areas, for any crack. (a)
6040 Flight Cycles
or 121 months.
-Repeat ETHF Inspections of
the overwing floor beams and
supports at any unrepaired
areas, for any crack. (a)
CONDITION 1.2:
NO CRACK
FOUND
-Before further flight.Do ETHF Inspections of the
overwing floor beams and
supports for any crack.
CONDITION 2:
NO REPAIR
FOUND
-Before further flight.CONDITION 2.1 (ACTION 1):
Contact The Boeing Company
for repair instructions and do
the repair.
CONDITION 2.1:
ANY CRACK
FOUND
6040 Flight Cycles
or 121 months.
-CONDITION 2.1 (ACTION 2):
Repeat ETHF Inspections of
the overwing floor beams and
supports for any crack. (a)
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### Page 10

Group 1:
Table 1: ETHF Inspection of the Overwing Floor Beams and Supports, Left and Right Sides
Repeat Interval
(Not to Exceed,
Whichever Oc-
curs First)
Compliance Time (Whichever Occurs
Later)
ActionCondition
6040 Flight Cycles
or 121 months.
-Repeat ETHF Inspections of
the overwing floor beams and
supports for any crack. (a)
CONDITION 2.2:
NO CRACK
FOUND
(a) It is not required to do the inspections in Requirements Bulletin DC10-53A184 RB in areas where a repair
covers the affected inspection zone provided that:
1. The repair is the corrective action to the crack condition identified while performing Requirements Bulletin
DC10-53A184 RB and installed after the original issue date of Requirements Bulletin DC10-53A184 RB,
AND
2. The installed repair was approved by the Boeing Organization Designation Authorization (ODA) via a
FAA Form 8100-9.
Group 2:
Table 2: ETHF Inspection of the Overwing Floor Beams and Detailed Inspection of the Overwing Floor
Beam Supports, Left and Right Sides
Repeat Interval
(Not to Exceed,
Whichever Oc-
curs First)
Compliance Time (Whichever Occurs
Later)
ActionCondition
-Within 1,990 flight
cycles or within 27
months, after the
original issue date
of Requirements
Bulletin DC10-
53A184 RB,
whichever occurs
first.
Before 20,000 total
flight cycles.
Do a General Visual Inspec-
tion of the overwing floor
beams for any repair.
ALL AIR-
PLANES
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Group 2:
Table 2: ETHF Inspection of the Overwing Floor Beams and Detailed Inspection of the Overwing Floor
Beam Supports, Left and Right Sides
Repeat Interval
(Not to Exceed,
Whichever Oc-
curs First)
Compliance Time (Whichever Occurs
Later)
ActionCondition
-Before further flight.CONDITION 3 (ACTION 1):
Contact The Boeing Company
for alternative inspection(s) to
Requirements Bulletin DC10-
53A184 RB, incorporate the
inspection(s) into the mainte-
nance programs and do the
inspection(s) at the times
specified by Boeing.
CONDITION 3:
ANY REPAIR
FOUND
-Before further flight.CONDITION 3 (ACTION 2):
Do Detailed Inspections of the
overwing floor beam supports
and ETHF Inspections of the
overwing floor beams at any
unrepaired areas, for any
crack.
-Before further flight.CONDITION 3.1 (ACTION 1):
Contact The Boeing Company
for repair instructions and do
the repair.
CONDITION 3.1:
ANY CRACK
FOUND
3610 Flight Cycles
or 73 months.
-CONDITION 3.1 (ACTION 2):
Repeat Detailed Inspections
of the overwing floor beam
supports and ETHF Inspec-
tions of the overwing floor
beams at any unrepaired ar-
eas, for any crack. (a)
3610 Flight Cycles
or 73 months.
-Repeat Detailed Inspections
of the overwing floor beam
supports and ETHF Inspec-
tions of the overwing floor
beams at any unrepaired ar-
eas, for any crack. (a)
CONDITION 3.2:
NO CRACK
FOUND
-Before further flight.Do Detailed Inspections of the
overwing floor beam supports
and ETHF Inspections of the
overwing floor beams for any
crack.
CONDITION 4:
NO REPAIR
FOUND
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Group 2:
Table 2: ETHF Inspection of the Overwing Floor Beams and Detailed Inspection of the Overwing Floor
Beam Supports, Left and Right Sides
Repeat Interval
(Not to Exceed,
Whichever Oc-
curs First)
Compliance Time (Whichever Occurs
Later)
ActionCondition
-Before further flight.CONDITION 4.1 (ACTION 1):
Contact The Boeing Company
for repair instructions and do
the repair.
CONDITION 4.1:
ANY CRACK
FOUND
3610 Flight Cycles
or 73 months.
-CONDITION 4.1 (ACTION 2):
Repeat Detailed Inspections
of the overwing floor beam
supports and ETHF Inspec-
tions of the overwing floor
beams for any crack. (a)
3610 Flight Cycles
or 73 months.
-Repeat Detailed Inspections
of the overwing floor beam
supports and ETHF Inspec-
tions of the overwing floor
beams for any crack. (a)
CONDITION 4.2:
NO CRACK
FOUND
(a) It is not required to do the inspections in Requirements Bulletin DC10-53A184 RB in areas where a repair
covers the affected inspection zone provided that:
1. The repair is the corrective action to the crack condition identified while performing Requirements Bulletin
DC10-53A184 RB and installed after the original issue date of Requirements Bulletin DC10-53A184 RB,
AND
2. The installed repair was approved by the Boeing Organization Designation Authorization (ODA) via a
FAA Form 8100-9.
4. APPROVAL
This Requirements Bulletin was examined by the Federal Aviation Administration (FAA). The changes
specified in this document comply with the applicable regulations and are FAA approved, as well as European
Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved
airplanes listed in the service bulletin effectivity. This document and its approval were based on the airplane
in its original Boeing delivery configuration or as modified by other Boeing changes.
If an airplane has a non-Boeing modification or repair that affects a component or system also affected by
this Requirements Bulletin, the operator is responsible for obtaining appropriate regulatory agency approval
before incorporating this Requirements Bulletin.
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5.    ACCOMPLISHMENT INSTRUCTIONS
A. GENERAL INFORMATION
NOTE: 1. This is an Enhanced Required for Compliance document. There w ill be a separate
Service Bulletin (SB) and a separate Requirements Bulletin (RB). If an RB is mandated
by an Airworthiness Directive (AD), then all applicable requirements specified in the
RB must be done. For the related SB, some locations are marked RC Start and RC
End to identify the requirements that are restated from the RB. For the related SB,
the areas between RC Start and RC End, including sub-steps and any figures
identified between RC Start and RC End, must be done to comply with the AD.
Therefore, an Alternative Method of Compliance (AMOC) is required for any deviations
to steps between RC Start and RC End, including substeps and identified figures.
For the related SB, the steps not between RC Start and RC End may be deviated
from using accepted methods in accordance with the operator's maintenance or
inspection program without obtaining approval of an AMOC; this is provided that the
steps between RC Start and RC End, including sub-steps and identified figures, can
still be done as specified, and the airplane can be put back in an airworthy condition.
Figures not required for compliance are omitted from the RB.
2. This is an Enhanced Required for Compliance document. The Boe ing processes
used to create the Service Bulletin (SB) and the Requirements Bulletin (RB) ensure
that the information between "RC Start" and "RC End" in the SB are identical to the
information in the same sections (Compliance, Work Instructions...) of the RB which
the SB refers to as the related document.
5. Unless shown differently, these dimensions and tolerances are  used:
– Linear dimensions are in inches
– Tolerance on linear dimensions, other than rivet and bolt edge  margins, is plus
or minus 0.03 inch.
– Tolerance on rivet and bolt edge margin is plus or minus 0.05 inch
– Angular tolerance is plus or minus 2 degrees
– Hole dimensions for standard solid rivets are in DC-10 Structu ral Repair Manual
(SRM) Volume 2, Chapter 51.
– Torque Values:
— Values for structural fasteners are given in DC-10 Structural Repair Manual
(SRM) Volume 2, Chapter 51.
— Values for airframe maintenance tasks are included in Chapter 20 of DC-10
Aircraft Maintenance Manual (AMM).
— Values for electrical maintenance tasks are included in Chapte r 20 of
Standard Wiring Practices Manual (SWPM).
— Values for engine maintenance tasks are included in Chapter 70  of DC-10
Aircraft Maintenance Manual (AMM).
— Non-standard torque values for maintenance tasks are included in the
applicable installation step.
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7. A Detailed Inspection is defined as: An intensive examination  of a specific item,
installation or assembly to detect damage, failure or irregularity. This could include
tactile assessment in which a component or assembly can be checked for
tightness/security. Available lighting is normally supplemented with a direct source
of good lighting at an intensity deemed appropriate. Inspection aids such as mirrors
and magnifying lenses may be necessary. Surface cleaning and elaborate access
procedures may be required.
8. A General Visual Inspection is defined as: A visual examinati on of an interior or
exterior area, installation or assembly to detect obvious damage, failure or irregularity.
This level of inspection is made from within touching distance unless otherwise
specified. A mirror may be necessary to enhance visual access to all exposed surfaces
in the inspection area. This level of inspection is made under normally available
lighting conditions such as daylight, hangar lighting, flashlight or drop-light and may
require removal or opening of access panels or doors. Stands, ladders or platforms
may be required to gain proximity to the area being checked.
9. These work instructions refer to procedures included in other  Boeing documents.
When the words "refer to" are used and the operator has an accepted alternative
procedure, the accepted alternative procedure can be used. When the words "in
accordance with" are included in the instruction, the procedure in the Boeing document
must be used.
10. If it is necessary to remove more parts for access, you can remove those parts. If
you can get access without removing identified parts, it is not necessary to remove
all of the identified parts. Jacking and shoring limitations must be observed.
11. When more than one OPTION is given for a CONDITION, do only one of the OPTION
numbers. When more than one ACTION is given for a CONDITION or an OPTION,
do all of the ACTION numbers for that CONDITION or OPTION.
12. The compliance times for the actions in WORK INSTRUCTIONS ar e in Compliance.
B. WORK INSTRUCTIONS
Actions Required for Compliance
1. Requirements
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### Page 15

Group 1:
Table 1: ETHF Inspection of the Overwing Floor Beams and Supports, Left and Right Sides
Refer to the listed
procedures in SB
DC10-53A184
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 1: GET
ACCESS
FIGURE 1Do a General Visual Inspec-
tion of the overwing floor
beams for any repair.
ALL AIRPLANES
-FIGURE 2
Do PART 2:
CLOSE ACCESS
-CONDITION 1 (ACTION 1):
Contact The Boeing Compa-
ny for alternative inspec-
tion(s) to Requirements Bul-
letin DC10-53A184 RB, incor-
porate the inspection(s) into
the maintenance programs
and do the inspection(s) at
the times specified by Boe-
ing.
CONDITION 1:
ANY REPAIR FOUND
Do PART 1: GET
ACCESS
-CONDITION 1 (ACTION 2):
Do ETHF Inspections of the
overwing floor beams and
supports at any unrepaired
areas, for any crack.
-FIGURE 3
-FIGURE 4
-FIGURE 5
-FIGURE 6
Do PART 2:
CLOSE ACCESS
-CONDITION 1.1 (ACTION
1): Contact The Boeing
Company for repair instruc-
tions and do the repair.
CONDITION 1.1: ANY
CRACK FOUND
Do PART 1: GET
ACCESS
-CONDITION 1.1 (ACTION
2): Repeat ETHF Inspections
of the overwing floor beams
and supports at any unre-
paired areas, for any crack.
(a)
-FIGURE 3
-FIGURE 4
-FIGURE 5
-FIGURE 6
Do PART 2:
CLOSE ACCESS
-
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### Page 16

Group 1:
Table 1: ETHF Inspection of the Overwing Floor Beams and Supports, Left and Right Sides
Refer to the listed
procedures in SB
DC10-53A184
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 2:
CLOSE ACCESS
-Repeat ETHF Inspections of
the overwing floor beams
and supports at any unre-
paired areas, for any crack.
(a)
CONDITION 1.2: NO
CRACK FOUND
Do PART 1: GET
ACCESS
-
-FIGURE 3
-FIGURE 4
-FIGURE 5
-FIGURE 6
Do PART 1: GET
ACCESS
-Do ETHF inspections of the
overwing floor beams and
supports for any crack.
CONDITION 2:
NO REPAIR FOUND
-FIGURE 3
-FIGURE 4
-FIGURE 5
-FIGURE 6
Do PART 2:
CLOSE ACCESS
-CONDITION 2.1 (ACTION
1): Contact The Boeing
Company for repair instruc-
tions and do the repair.
CONDITION 2.1: ANY
CRACK FOUND
Do PART 1: GET
ACCESS
-CONDITION 2.1 (ACTION
2): Repeat ETHF Inspections
of the overwing floor beams
and supports for any crack.
(a)
-FIGURE 3
-FIGURE 4
-FIGURE 5
-FIGURE 6
Do PART 2:
CLOSE ACCESS
-
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REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 17

Group 1:
Table 1: ETHF Inspection of the Overwing Floor Beams and Supports, Left and Right Sides
Refer to the listed
procedures in SB
DC10-53A184
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 2:
CLOSE ACCESS
-Repeat ETHF inspections of
the overwing floor beams
and supports for any crack.
(a)
CONDITION 2.2: NO
CRACK FOUND
Do PART 1: GET
ACCESS
-
-FIGURE 3
-FIGURE 4
-FIGURE 5
-FIGURE 6
(a) It is not required to do the inspections in Requirements Bul letin DC10-53A184 RB in areas where a
repair covers the affected inspection zone provided that:
1. The repair is the corrective action to the crack condition identified while performing Requirements
Bulletin DC10-53A184 RB and installed after the original issue date of Requirements Bulletin DC10-
53A184 RB,
AND
2. The installed repair was approved by the Boeing Organization Designation Authorization (ODA) via
a FAA Form 8100-9.
Group 2:
Table 2: ETHF Inspection of the Overwing Floor Beams and Detailed Inspection of the Overwing Floor
Beam Supports, Left and Right Sides
Refer to the listed
procedures in SB
DC10-53A184
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 1: GET
ACCESS
FIGURE 1Do a General Visual Inspec-
tion of the overwing floor
beams for any repair.
ALL AIRPLANES
-FIGURE 2
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REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 18

Group 2:
Table 2: ETHF Inspection of the Overwing Floor Beams and Detailed Inspection of the Overwing Floor
Beam Supports, Left and Right Sides
Refer to the listed
procedures in SB
DC10-53A184
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 2:
CLOSE ACCESS
-CONDITION 3 (ACTION 1):
Contact The Boeing Compa-
ny for alternative inspec-
tion(s) to Requirements Bul-
letin DC10-53A184 RB, incor-
porate the inspection(s) into
the maintenance programs
and do the inspection(s) at
the times specified by Boe-
ing.
CONDITION 3:
ANY REPAIR FOUND
Do PART 1: GET
ACCESS
-CONDITION 3 (ACTION 2):
Do Detailed Inspections of
the overwing floor beam
supports and ETHF Inspec-
tions of the overwing floor
beams at any unrepaired ar-
eas, for any crack.
-FIGURE 3
-FIGURE 4
-FIGURE 7
-FIGURE 8
Do PART 2:
CLOSE ACCESS
-CONDITION 3.1 (ACTION
1): Contact The Boeing
Company for repair instruc-
tions and do the repair.
CONDITION 3.1: ANY
CRACK FOUND
Do PART 1: GET
ACCESS
-CONDITION 3.1 ACTION 2:
Repeat Detailed Inspections
of the overwing floor beam
supports and ETHF Inspec-
tions of the overwing floor
beams at any unrepaired ar-
eas, for any crack. (a)
-FIGURE 3
-FIGURE 4
-FIGURE 7
-FIGURE 8
Do PART 2:
CLOSE ACCESS
-
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REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 19

Group 2:
Table 2: ETHF Inspection of the Overwing Floor Beams and Detailed Inspection of the Overwing Floor
Beam Supports, Left and Right Sides
Refer to the listed
procedures in SB
DC10-53A184
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 2:
CLOSE ACCESS
-Repeat Detailed Inspections
of the overwing floor beam
supports and ETHF Inspec-
tions of the overwing floor
beams at any unrepaired ar-
eas, for any crack. (a)
CONDITION 3.2: NO
CRACK FOUND
Do PART 1: GET
ACCESS
-
-FIGURE 3
-FIGURE 4
-FIGURE 7
-FIGURE 8
Do PART 1: GET
ACCESS
-Do Detailed Inspections of
the overwing floor beam
supports and ETHF Inspec-
tions of the overwing floor
beams for any crack.
CONDITION 4:
NO REPAIR FOUND
-FIGURE 3
-FIGURE 4
-FIGURE 7
-FIGURE 8
Do PART 2:
CLOSE ACCESS
-CONDITION 4.1 (ACTION
1): Contact The Boeing
Company for repair instruc-
tions and do the repair.
CONDITION 4.1: ANY
CRACK FOUND
Do PART 1: GET
ACCESS
-CONDITION 4.1 (ACTION
2): Repeat Detailed Inspec-
tions of the overwing floor
beam supports and ETHF
Inspections of the overwing
floor beams for any crack.
(a)
-FIGURE 3
-FIGURE 4
-FIGURE 7
-FIGURE 8
Do PART 2:
CLOSE ACCESS
-
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ALERTALERT

### Page 20

Group 2:
Table 2: ETHF Inspection of the Overwing Floor Beams and Detailed Inspection of the Overwing Floor
Beam Supports, Left and Right Sides
Refer to the listed
procedures in SB
DC10-53A184
Original Issue or
later approved re-
visions as an ac-
cepted procedure
Method of ComplianceActionCondition
Do PART 2:
CLOSE ACCESS
-Repeat Detailed Inspections
of the overwing floor beam
supports and ETHF Inspec-
tions of the overwing floor
beams for any crack. (a)
CONDITION 4.2: NO
CRACK FOUND
Do PART 1: GET
ACCESS
-
-FIGURE 3
-FIGURE 4
-FIGURE 7
-FIGURE 8
(a) It is not required to do the inspections in Requirements Bul letin DC10-53A184 RB in areas where a
repair covers the affected inspection zone provided that:
1. The repair is the corrective action to the crack condition identified while performing Requirements
Bulletin DC10-53A184 RB and installed after the original issue date of Requirements Bulletin DC10-
53A184 RB,
AND
2. The installed repair was approved by the Boeing Organization Designation Authorization (ODA) via
a FAA Form 8100-9.
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REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 21 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
STA
Y = 1305
STA
Y = 1256
STA
Y = 1305
STA
Y = 1293
SIA
Y = 1275
STA
Y = 1256
STA
X = 90
GENERAL VISUAL INSPECTION  STA  FWD  2884447
X = 116
FIGURE 1: LEFT SIDE - GENERAL VISUAL INSPECTION OF THE OVERWING FLOOR BEAMS
(SHEET 1 OF 2)
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### Page 22

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a)--FLOOR BEAMSInspect1
(a) Do a General Visual Inspection for any repair of the floor beams from STA X=90 to X=116 at STA Y=1256,
1275, 1293 and 1305.
FIGURE 1: LEFT SIDE - GENERAL VISUAL INSPECTION OF THE OVERWING FLOOR BEAMS
(SHEET 2 OF 2)
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REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 23 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
STA
Y = 1305
STA
Y = 1256
STA
Y = 1305
STA
Y = 1293
STA
· = 1275
STA
Y = 1256
STA
× = 90
GENERAL VISUAL INSPECTION X = 116  STA  FWD  2902559
FIGURE 2: RIGHT SIDE - GENERAL VISUAL INSPECTION OF THE OVERWING FLOOR BEAMS
(SHEET 1 OF 2)
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### Page 24

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a)--FLOOR BEAMSInspect1
(a) Do a General Visual Inspection for any repair of the floor beams from STA X=90 to X=116 at STA Y=1256,
1275, 1293 and 1305.
FIGURE 2: RIGHT SIDE - GENERAL VISUAL INSPECTION OF THE OVERWING FLOOR BEAMS
(SHEET 2 OF 2)
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REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 25 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
STA
Y = 1305
STA
Y = 1256
STA
Y = 1305
STA
Y = 1293
STA
Y = 1275
STA
Y = 1256
A, E
STA
X = 90
STA  FWD  2902575
X = 116
FIGURE 3: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 1 OF 10)
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### Page 26 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
- •
FLOOR BEAM
TYPICAL  CRACK
STA  X = 107
FLOOR SUPPORT  TYPICAL TYPICAL CRACK  LOOKING AFT  FLOOR BEAM  (TYPICAL)  A-A
CRACK
TYPICAL  CRACK  TYPICAL  CRACK  FASTENER PATTERN MAY VARY  ETHF INSPECTION
NOTE:  2884507
FIGURE 3: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 2 OF 10)
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### Page 27 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
STA  X = 116
TYPICAL CRACK
LOOKING DOWN  FLOOR BEAM  (TYPICAL)  B-B
TYPICAL CRACK
FASTENER PATTERN MAY VARY  ETHF INSPECTION
NOTE:  2884664
FIGURE 3: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 3 OF 10)
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### Page 28 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
- 04
TYPICAL  CRACK
TYPICAL CRACK
TYPICAL  CRACK
STA  X = 107  GENI
TYPICAL CRACK
TYPICAL CRACK  FASTENER PATTERN MAY VARY  ETHF INSPECTION
STA  X = 116  NOTE:  2884681
FIGURE 3: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 4 OF 10)
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### Page 29 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
TYPICAL CRACK
TYPICAL CRACK  FLOOR BEAM  INBD  a-a
FRAME  FASTENER PATTERN MAY VARY  ETHF INSPECTION
NOTE:  2901807
FIGURE 3: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 5 OF 10)
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### Page 30 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
FLOOR BEAM
STA  X = 107
FLOOR SUPPORT  LOOKING AFT  FLOOR BEAM  TYPICAL  E-E
TYPICAL CRACK
PROBE  FASTENER PATTERN MAY VARY  ETHF INSPECTION
NOTE:  2884996
FIGURE 3: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 6 OF 10)
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### Page 31 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
FWD
FLOOR BEAM
STA Y=1275 SHOWN STA Y=1293 SIMILAR
F-F
ATTACHED ANGLE
ETHF INSPECTION
FLOOR BEAM MODIFICATION
STA Y=1275 SHOWN STA Y=1293 SIMILAR  F-F  2885033
FIGURE 3: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 7 OF 10)
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### Page 32

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a)--Floor Beam: Around
Fastener Holes
Inspect1
(b)--Floor Beam: Web and
Flange Surfaces
Inspect2
(c)--Floor Beam: Flange
Edges
Inspect3
FIGURE 3: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 8 OF 10)
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REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 33

More DataQtyIdentificationNameTaskStep
(a) Do an ETHF inspection of the overwing floor beam web and the upper and lower flanges at each fastener
location for any crack from STA X = 90 to 116 at stations Y = 1256, 1275, 1293 and 1305 in accordance
with NDTSPM Part 06-10-01.001, Procedure 1. Inspect the beam upper flange on both surfaces. Inspect
the beam web on either face, as applicable to avoid obstructions. Inspect the beam lower flange on the
upper or lower surface, as needed to avoid obstructions.
1. Calibrate instrument on the N3 notch, in accordance with in F igure 2 of the NDTSPM procedure.
2. Utilize calibration Scan Method K, in accordance with Figure 3, Sheet 2 of the NDTSPM procedure
to produce an impedance plane display similar to that shown in Figure 1 of the NDTSPM proce-
dure.
3. To inspect, use Scan Method 44, in accordance with Figure 4, Sheets 1 and 2, of the NDTSPM
procedure.
4. Scan around all fastener holes on the web and flange surfaces  of the four floor beams, as noted
above. Structure attached to the floor beams does not have to be detached from the floor beams.
– From STA X = 90 to 116 at stations Y = 1256, 1275, 1293 and 13 05.
(b) Do an ETHF inspection of the flat surfaces of the floor beam flanges and webs for any crack from STA X
= 90 to 116 at stations Y = 1256, 1275, 1293 and 1305 in accordance with NDTSPM Part 06-10-01.001,
Procedure 1.
1. Calibrate instrument on the N5 notch, in accordance with Figu re 2 of the NDTSPM procedure.
2. Utilize calibration Scan Method F, in accordance with Figure 3, Sheet 1 of the NDTSPM procedure
to produce an impedance plane display similar to that shown in Figure 1 of the NDTSPM proce-
dure.
3. To inspect, use Scan Method 61, in accordance with Figure 6, Sheets 1 and 2, of the NDTSPM
procedure.
4. Scan all web and flange surfaces of the four floor beams. Str ucture attached to the floor beams
does not have to be detached from the floor beams.
– From STA X = 90 to 116 at stations Y = 1256, 1275, 1293 and 13 05.
– Scan between fastener rows, and between holes and edges. Where no fasteners exist, scan
incrementally, approximately 1/4 inch apart.
– Scan angles which compose the floor beam (not repair angles).
FIGURE 3: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 9 OF 10)
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REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 34

More DataQtyIdentificationNameTaskStep
(c) Do an ETHF inspection of the floor beam flange edges for any  crack from STA X = 90 to 116 at stations
Y = 1256, 1275, 1293 and 1305 in accordance with NDTSPM Part 06-10-01.001, Procedure 1.
1. Calibrate instrument using the N5 notch, in accordance with F igure 2 of the NDTSPM procedure.
2. Utilize Scan Method J, in accordance with Figure 3, Sheet 1 o f the NDTSPM procedure to produce
an impedance plane display similar to that shown in Figure 1 of the NDTSPM procedure.
3. To inspect, use Scan Method 71 in accordance with Figure 7, S heets 1 and 2 of the NDTSPM
procedure.
4. Scan along all edges of the four floor beams (and attached an gle, if present). Structure attached
to the floor beams does not have to be detached from the floor beams.
– From STA X = 90 to 116 at stations Y = 1256, 1275, 1293 and 13 05.
FIGURE 3: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 10 OF 10)
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REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 35 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
STA
Y = 1305
STA
Y = 1256
STA
Y = 1305
STA
Y = 1293
STA
Y= 1275
A, E Y = 1256  STA
STA
X = 90
STA  FWD  2902595
X = 116
FIGURE 4: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 1 OF 10)
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### Page 36 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
STA  X = 90
TYPICAL CRACK
FLOOR SUPPORT  TYPICAL CRACK
LOOKING AFT  FLOOR BEAM  (TYPICAL)  A-A
STA  X = 107
TYPICAL CRACK
STA  FLOOR BEAM  FASTENER PATTERN MAY VARY  ETHE INSPECTION
NOTE:  2902600
FIGURE 4: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 2 OF 10)
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### Page 37 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
→0
TYPICAL CRACK  FWD
LOOKING DOWN  FLOOR BEAM  (TYPICAL)  B-B
× = TOT
TYPICAL CRACK  FASTENER PATTERN MAY VARY  ETHF INSPECTION
NOTE:  2902601
FIGURE 4: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 3 OF 10)
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### Page 38 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
× - T76
TYPICAL CRACK
STA  X = 107  GSNI  C-C
TYPICAL  CRACK
FASTENER PATTERN MAY VARY  ETHF INSPECTION
×  =  NOTE:  2902627
FIGURE 4: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 4 OF 10)
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### Page 39 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
TYPICAL CRACK  FLOOR BEAM  LOOKING UP  FLOOR BEAM  (TYPICAL)  D-D
TYPICAL CRACK
FASTENER PATTERN MAY VARY  ETHF INSPECTION
NOTE:  2902637
FIGURE 4: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 5 OF 10)
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### Page 40 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
TYPICAL  CRACK
FLOOR SUPPORT  TYPICAL  CRACK  LOOKING AFT  FLOOR BEAM  TYPICAL  E-E
STA  X = 107
TYPICAL  CRACK
FLOOR BEAM  FASTENER PATTERN MAY VARY  ETHF INSPECTION
NOTE:  2902640
FIGURE 4: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 6 OF 10)
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### Page 41 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
FWD
- LOOR BEAM
STA Y=1275 SHOWN STA Y=1293 SIMILAF
F-F
ATTACHED ANGLE
2
(3
ETHF INSPECTION
-LOOR BEAM MODIFICATIO!
STA Y=1275 SHOWN STA Y= 1293 SIMILAF  F-F  2902673
FIGURE 4: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 7 OF 10)
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### Page 42

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a)--Floor Beam: Around
Fastener Holes
Inspect1
(b)--Floor Beam: Web and
Flange Surfaces
Inspect2
(c)--Floor Beam: Flange
Edges
Inspect3
FIGURE 4: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 8 OF 10)
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REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 43

More DataQtyIdentificationNameTaskStep
(a) Do an ETHF inspection of the overwing floor beam web and the upper and lower flanges at each fastener
location for any crack from STA X = 90 to 116 at stations Y = 1256, 1275, 1293 and 1305 in accordance
with NDTSPM Part 06-10-01.001, Procedure 1. Inspect the beam upper flange on both surfaces. Inspect
the beam web on either face, as applicable to avoid obstructions. Inspect the beam lower flange on the
upper or lower surface, as applicable to avoid obstructions.
1. Calibrate instrument on the N3 notch, in accordance with Figu re 2 of the NDTSPM procedure.
2. Utilize calibration Scan Method K, in accordance with Figure 3, Sheet 2 of the NDTSPM procedure
to produce an impedance plane display similar to that shown in Figure 1 of the NDTSPM proce-
dure.
3. To inspect, use Scan Method 44, in accordance with Figure 4, Sheets 1 and 2, of the NDTSPM
procedure.
4. Scan around all fastener holes on the web and flange surfaces  of the four floor beams, as noted
above. Structure attached to the floor beams does not have to be detached from the floor beams.
– From STA X = 90 to 116 at stations Y = 1256, 1275, 1293 and 13 05.
(b) Do an ETHF inspection of the flat surfaces of the floor beam flanges and webs for any crack from STA X
= 90 to 116 at stations Y = 1256, 1275, 1293 and 1305 in accordance with NDTSPM Part 06-10-01.001,
Procedure 1.
1. Calibrate instrument on the N5 notch, in accordance with Figu re 2 of the NDTSPM procedure.
2. Utilize calibration Scan Method F, in accordance with Figure 3, Sheet 1 of the NDTSPM procedure
to produce an impedance plane display similar to that shown in Figure 1 of the NDTSPM proce-
dure.
3. To inspect, use Scan Method 61, in accordance with Figure 6, Sheet 1 and 2, of the NDTSPM
procedure.
4. Scan all web and flange surfaces of the four floor beams. Str ucture attached to the floor beams
does not have to be detached from the floor beams.
– From STA X = 90 to 116 at stations Y = 1256, 1275, 1293 and 13 05.
– Scan between fastener rows, and between holes and edges. Where no fasteners exist, scan
incrementally, approximately 1/4 inch apart.
– Scan angles which compose the floor beam (not repair angles).
FIGURE 4: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 9 OF 10)
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REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 44

More DataQtyIdentificationNameTaskStep
(c) Do an ETHF inspection of the floor beam flange edges for any  crack from STA X = 90 to 116 at stations
Y = 1256, 1275, 1293 and 1305 in accordance with NDTSPM Part 06-10-01.001, Procedure 1.
1. Calibrate instrument using the N5 notch, in accordance with i n Figure 2 of the NDTSPM procedure.
2. Utilize Scan Method J, in accordance with Figure 3, Sheet 1 o f the NDTSPM procedure to produce
an impedance plane display similar to that shown in Figure 1 of the NDTSPM procedure.
3. To inspect, use Scan Method 71, in accordance with Figure 7, Sheets 1 and 2, of the NDTSPM
procedure.
4. Scan along all edges of the four floor beams (and attached an gle, if present). Structure attached
to the floor beams does not have to be detached from the floor beams.
– From STA X = 90 to 116 at stations Y = 1256, 1275, 1293 and 13 05.
FIGURE 4: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAMS
(SHEET 10 OF 10)
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DC10-53A184 RB
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REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 45 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
This Figure applies only to: Group 1.
STA
Y = 1305
STA
Y = 1256
_ STA  _ STA  STA  VIS
Y = 1231  Y = 1256  Y = 1275  Y = 1293  Y = 1305  Y = 1321
STA 81
A
2885058
FIGURE 5: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAM SUPPORTS
(SHEET 1 OF 6)
Original Issue: February 06, 2020
Export Controlled ECCN: 9E991  Copyright © Unpublished  DC10-53A184 RB
Work - See page 1 for details.  45 of 62

### Page 46 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
STA
X = 107
X = 81.0
- B
INBD
3 INCHES
TYPICAL CRACK  TYPICAL  CRACK
ETHF INSPECTION  - B
LOOKING FORWARD
FLOOR BEAM SUPPORT
Y = 1305 SHOWN
Y = 1256, Y = 1275, AND Y = 1293 SIMILAR  2885092
A-A
FIGURE 5: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAM SUPPORTS
(SHEET 2 OF 6)
Original Issue: February 06, 2020
Export Controlled ECCN: 9E991  DC10-53A184 RB
Copyright © Unpublished
Work - See page 1 for details.  46 of 62

### Page 47 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
— FILLER
3 INCHES
- TYPICAL CRACK
TYPICAL
CRACK
ETHF INSPECTION
VIEW LOOKING INBOARD AT X = 81
Y = 1305 SHOWN,
Y = 1256, Y = 1275 AND Y = 1293 SIMILAR  B-B  2885156
FIGURE 5: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAM SUPPORTS
(SHEET 3 OF 6)
Original Issue: February 06, 2020
Export Controlled ECCN: 9E991  DC10-53A184 RB
Copyright © Unpublished
Work - See page 1 for details.  47 of 62

### Page 48

FIGURE 5: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAM SUPPORTS
(SHEET 4 OF 6)
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: February 06, 2020
DC10-53A184 RB
48 of 62
REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 49 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
• FILLER
• FILLET
•TYPICAL CRACK
3 INCHES
- TYPICAL CRACK
-WD
Y = 1305 SHOWN,
Y = 1256, Y = 1275 AND Y = 1293 SIMILAR  ETHF INSPECTION
D-D  2902158
FIGURE 5: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
_ FLOOR BEAM SUPPORTS
(SHEET 5 OF 6)
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Work - See page 1 for details.  49 of 62

### Page 50

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a)--Floor Beam Support:
Flange Surface
Inspect1
(b)--Floor Beam Support:
Flange Edges
Inspect2
(a) Do an ETHF inspection of the floor beam support flange flat surfaces for any crack for STA X=81 at STA
Y=1256, 1275, 1293 and 1305 in accordance with NDTSPM Part 06-10-01.001, Procedure 1.
1. Calibrate the instrument on the N5 notch, in accordance with Figure 2 of the NDTSPM procedure.
2. Utilize calibration Scan Method F, in accordance with Figure 3, Sheet 1 of the NDTSPM procedure
to produce an impedance plane display similar to that shown in Figure 1 of the NDTSPM proce-
dure.
3. To inspect, use Scan Method 61, in accordance with Figure 6, Sheet 2 of the NDTSPM.
4. Scan both faces of each of the four flanges of the floor beam  supports.
– For STA X = 81 at stations Y = 1256, 1275, 1293 and 1305, from  the bottom of the floor
beam down a minimum of 3 inches.
– Thoroughly scan the fillet radius at the flange thickness chan ge.
(b) Do an ETHF inspection of the edges of the four flanges of the supports for any crack in accordance with
NDTSPM Part 06-10-01.001.
1. Calibrate instrument using the N9 notch, in accordance with F igure 2 of the NDTSPM procedure.
2. Utilize calibration Scan Method H, in accordance with Figure 3, Sheet 2 of the NDTSPM procedure
to produce an impedance plane display similar to that shown in Figure 1 of the NDTSPM proce-
dure.
3. To inspect, scan along the edge of each of the four flanges o f the floor beam supports, to a
minimum of 3 inches below the floor beam, using Scan Method 71 in accordance with Figure 7,
Sheet 1 and 2 of the NDTSPM.
– For STA X = 81 at stations Y = 1256, 1275, 1293 and 1305, from  the bottom of the floor
beam down a minimum of 3 inches.
FIGURE 5: LEFT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAM SUPPORTS
(SHEET 6 OF 6)
Export Controlled ECCN: 9E991
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Original Issue: February 06, 2020
DC10-53A184 RB
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REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 51 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
This Figure applies only to: Group 1.
STA
Y = 1305
10  STA
Y = 1256
_ STA  STA  STA  STA  STA  STA
Y = 1231  Y = 1256  Y = 1275  Y = 1293 Y = 1305  Y = 1321
STA 81
2902693
FIGURE 6: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAM SUPPORTS
(SHEET 1 OF 6)
Original Issue: February 06, 2020
Export Controlled ECCN: 9E991  DC10-53A184 RB
Copyright © Unpublished
Work - See page 1 for details.  51 of 62

### Page 52 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
STA
X = 107
X = 81.0
3 INCHES
TYPICAL  TYPICAL
CRACK  CRACK
ETHF INSPECTION
LOOKING FORWARD
FLOOR BEAM SUPPORT
Y = 1305 SHOWN
Y = 1256, Y = 1275, AND Y = 1293 SIMILAR  2902695
A-A
FIGURE 6: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAM SUPPORTS
(SHEET 2 OF 6)
Original Issue: February 06, 2020
Export Controlled ECCN: 9E991  DC10-53A184 RB
Copyright © Unpublished
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### Page 53 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
FILLER-
3 INCHES
TYPICAL
CRACK
TYPICAL CRACK
ETHF INSPECTION
VIEW LOOKING INBOARD AT X = 81
Y = 1305 SHOWN,
Y = 1256, Y = 1275 AND Y = 1293 SIMILAR  B-B  2902696
FIGURE 6: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAM SUPPORTS
(SHEET 3 OF 6)
Original Issue: February 06, 2020
Export Controlled ECCN: 9E991  DC10-53A184 RB
Copyright © Unpublished
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### Page 54

FIGURE 6: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAM SUPPORTS
(SHEET 4 OF 6)
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: February 06, 2020
DC10-53A184 RB
54 of 62
REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 55 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
FILLER
TYPICAL CRACK
FILLET•
3 INCHES
TYPICAL CRACK
FWD
Y = 1305 SHOWN
ETHF INSPECTION  Y = 1256, Y = 1275 AND Y = 1293 SIMILAR
D-D  2902707
FIGURE 6: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAM SUPPORTS
(SHEET 5 OF 6)
Original Issue: February 06, 2020
Export Controlled ECCN: 9E991  DC10-53A184 RB
Copyright © Unpublished
Work - See page 1 for details.  55 of 62

### Page 56

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a)--Floor Beam Support:
Flange Surface
Inspect1
(b)--Floor Beam Support:
Flange Edges
Inspect2
(a) Do an ETHF inspection of the floor beam support flange flat surfaces for any crack for STA X=81 at STA
Y=1256, 1275, 1293 and 1305 in accordance with NDTSPM Part 06-10-01.001, Procedure 1.
1. Calibrate instrument the N5 notch, in accordance with Figure 2 of the NDTSPM procedure.
2. Utilize calibration Scan Method F, in accordance with Figure 3, Sheet 1 of the NDTSPM procedure
to produce an impedance plane display similar to that shown in Figure 1 of the NDTSPM proce-
dure.
3. To inspect, use scan Method 61, in accordance with Figure 6, Sheet 2 of the NDTSPM.
4. Scan both faces of each of the four flanges of the floor beam  supports.
– For STA X = 81 at stations Y = 1256, 1275, 1293 and 1305, from  the bottom of the floor
beam down a minimum of 3 inches.
– Thoroughly scan the fillet radius at the flange thickness chan ge.
(b) Do an ETHF inspection of the edges of the four flanges of th e supports for any crack for STA X=81 for
STA Y=1256, 1275, 1293 and 1305 in accordance with NDTSPM Part 06-10-01.
1. Calibrate instrument using the N9 notch, in accordance with F igure 2 of the NDTSPM procedure.
2. Utilize calibration Scan Method H, in accordance with Figure 3, Sheet 2 of the NDTSPM procedure
to produce an impedance plane display similar to that shown in Figure 1 of the NDTSPM proce-
dure.
3. To inspect, scan along the edge of each of the four flanges o f the floor beam supports, to a
minimum of 3 inches below the floor beam, using Scan Method 71 in accordance with Figure 7,
Sheet 1 and 2 of the NDTSPM.
– For STA X = 81 at stations Y = 1256, 1275, 1293 and 1305, from  the bottom of the floor
beam down a minimum of 3 inches.
FIGURE 6: RIGHT SIDE - EDDY CURRENT HIGH FREQUENCY (ETHF) INSPECTION OF THE OVERWING
FLOOR BEAM SUPPORTS
(SHEET 6 OF 6)
Export Controlled ECCN: 9E991
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Original Issue: February 06, 2020
DC10-53A184 RB
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REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 57 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
This Figure applies only to: Group 2.
STA
Y = 1305
STA
Y = 1256
_ STA  STA  STA  STA  STA  STA
Y = 1231  Y = 1256  Y = 1275  Y = 1293 Y = 1305  Y = 1321
STA 81
2885151
FIGURE 7: LEFT SIDE - DETAILED INSPECTION OF OVERWING FLOOR BEAM SUPPORTS
(SHEET 1 OF 3)
Original Issue: February 06, 2020
Export Controlled ECCN: 9E991  DC10-53A184 RB
Copyright © Unpublished
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### Page 58 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
STA  STA
X = 81  X = 107
STA
Y = 1305 SHOWN
Y = 1256
Y = 1275
Y = 1293
SIMILAR
B
LOOKING FORWARD
FLOOR BEAM SUPPORT
Y = 1305 SHOWN
Y = 1256, Y = 1275 AND Y = 1293 SIMILAR
A-A
TYPICAL
B-B
DETAILED INSPECTION  2885392
FIGURE 7: LEFT SIDE - DETAILED INSPECTION OF OVERWING FLOOR BEAM SUPPORTS
(SHEET 2 OF 3)
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### Page 59

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a)--Floor Beam Support:
Rods and Rod Ends
Inspect1
(a) Do a Detailed Inspection of the floor beam support rods, rod ends and attached pieces, for any crack for
STA X=81 at STA Y=1256, 1275, 1293 and 1305.
FIGURE 7: LEFT SIDE - DETAILED INSPECTION OF OVERWING FLOOR BEAM SUPPORTS
(SHEET 3 OF 3)
Export Controlled ECCN: 9E991
Copyright © Unpublished
Work - See page 1 for details.
Original Issue: February 06, 2020
DC10-53A184 RB
59 of 62
REQUIREMENTS BULLETIN DC10-53A184
ALERTALERT

### Page 60 (OCR)

REQUIREMENTS BULLETIN DC10-53A184
ALERT  ALERT
This Figure applies only to: Group 2.
STA
Y = 1305
STA
Y = 1256
STA  STA  STA  STA  STA  STA
Y = 1231  1256  Y = 1275  Y = 1293 Y = 1305  Y = 1321
STA 81
2902694
FIGURE 8: RIGHT SIDE - DETAILED INSPECTION OF OVERWING FLOOR BEAM SUPPORTS
(SHEET 1 OF 3)
Original Issue: February 06, 2020
Export Controlled ECCN: 9E991  DC10-53A184 RB
Work - See page 1 for details.  Copyright © Unpublished  60 of 62

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