Service difficulty report · Angle · Boeing 7378

Difficulty date
June 2, 2023
Submitted
June 27, 2023
Operation
Air carrier
Aircraft
N8705Q
Make and model
Boeing 7378
Aircraft serial
42558
Aircraft time
12,340 hours, 5,351 cycles
Part
Angle
Part number
UNKNOWN
Condition
Corroded
Location
Zn 100 Fus Lower
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

A-221-04 AFT CARGO COMPARTMENT L//H/S Z ANGLE BETWEEN STA 807 AND 727F TOP SKIN SURFACE SEVERAL AREAS AS MARKED ARE CORRODED<[01] BLENDED OUT CORROSION SPOTS FROM STA 727F TO STA 807; FOUND TO BE WITHIN LIMITS FROM STA 727F TO 727H + 10' AND FROM STA 767+10' TO STA 807 WITH MAX DEPTH+0.004'. I.A.W. SRM 53-00-53-1A-2<BR>FOUND TO BE OUT OF LIMITS FROM STA 727H + 10' TO STA 767+10' I.A.W. SRM 53-00-53-1A-2 WITH MAX DEPTH=.009;[02] ADDED TOOL NUMBER TO STEP 1.<BR>TOOL USED: AAR 21461; DUE 10/19/23;[03] VERIFIED STEPS 1 AND 2;[04] CUT OUT DAMAGE SECTION OF Z-ANGLE AT STA 727H+10' TO 787+10' IAW SRM 53-00-53-2R--5 FIG 201;[05] VERIFIED MATERIAL ID FOR REPAIR PARTS IS BAC1496-377 7075-T62 TAG# A120477 IAW SRM 53-00-53-2R-5; STARTED LOCATING AND DRILLING AND FABRICATING L/H Z ANGLE IWA SRM 53-00-53-2R-5 ;51-40-02-0G-0; FINISHED FABRICATING REPAIR Z ANGLE I.A.W SRM 53-00-53-2R-5;APPLIED ALODINE AND PRIMER Z-ANGLE STA 727F; 727H +10 AND 787+10 ;847 IAW SRM 51-20-01 AND AMM 51-21-72-370-804;[15] APPLIED ALODINE AND PRIMER REPAIR PARTS IAW SRM 51-20-01 AMM 51-21-72-370-804;[16] VERIFIED ACTION ITEMS 14 & 15;[17] OK TO INSTALL Z ANGLE;[18] STARTED INSTALLING L/H Z ANGLE IAW SRM 51-40-02-0G-0 AND SRM 53-00-53-2R-5; FINISHED INSTALLING L/H Z ANGLE AND SPLICES IAW SRM 53-00-53-2R-5 AND DWG 146A7500 REV - AND 146A7502 REV -;[21] VERIFIED STEP 20<BR><BR>OK TO CIC;[22] APPLIED CIC TO AREAS WHERE IT WAS DISTURBED IAW SRM 53-00-53-2R-5 AND SOPM 20-41-05

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