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Commercial Airplanes 737 Service Bulletin ALERT Number: 737-26A1137 Original Issue: May 22, 2014 Revision 2: January 27, 2020 ATA System: 2616 2127 SUBJECT: FIRE PROTECTION - Cargo Bay Smoke Detection - Equipment Cooling System Smoke Clearance Mode Operational Test for Cargo Smoke Protection 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:
BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET Copyright © 2014 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Unpublished Work.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: May 22, 2014 737-26A1137Revision 2: January 27, 2020 1 of 31
4.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137Revision 2: January 27, 2020 2 of 31 BOEING SERVICE BULLETIN 737-26A1137
ALERTALERT
BLANK PAGE
Table of Contents
Revision Transmittal Sheet5
Summary7
1. PLANNING INFORMATION11
A. Effectivity11
1. Airplanes11
2. Spares Affected21
B. Concurrent Requirements21
C. Reason21
D. Description22
E. Compliance23
F. Approval24
G. Manpower25
H. Weight and Balance Changes25
I. Electrical Load Data25
J. References26
1. Existing Data:26
2. Data Supplied with this Service Bulletin:26
3. Installation Drawings Used in the Preparation of this Service Bulletin:26
K. Publications Affected26
L. Interchangeability and Intermixability of Parts26
M. Software Accomplishment Summary26
2. MATERIAL INFORMATION27
A. Material - Price and Availability27
B. Industry Support Information27
C. Parts Necessary for Each Airplane27
1. Kits/Parts:27
2. Parts and Materials Supplied by the Operator:27
3. Parts Modified and Reidentified:27
4. Parts Removed and Not Replaced:27
D. Parts Necessary to Change Spares27
E. Special Tooling - Price and Availability27
F. Special Tooling Necessary to do this Service Bulletin27
3. ACCOMPLISHMENT INSTRUCTIONS29
A. GENERAL INFORMATION29
B. WORK INSTRUCTIONS30
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137Revision 2: January 27, 2020 3 of 31 BOEING SERVICE BULLETIN 737-26A1137
ALERTALERT
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137Revision 2: January 27, 2020 4 of 31 BOEING SERVICE BULLETIN 737-26A1137
ALERTALERT
BLANK PAGE
Commercial Airplanes 737 Service Bulletin ALERT Revision Transmittal SheetNumber: 737-26A1137Original Issue: May 22, 2014 Revision 2: January 27, 2020 ATA System: 2616 2127 SUBJECT: FIRE PROTECTION - Cargo Bay Smoke Detection - Equipment Cooling System Smoke Clearance Mode Operational Test for Cargo Smoke Protection This revision includes all pages of the service bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Airworthiness Directive (AD) 2016-04-06 is related to this service bulletin.
Effects of this Revision on airplanes on which Original Issue or Revision 1 was previously done:
None.
Airplanes YG044, YG067, YG069, YG074, YG081, YG084 and YG088 were added to new Group 5 of this service bulletin.
REASON FOR REVISION This revision is sent to add airplanes YG044, YG067, YG069, YG074, YG081, YG084 and YG088 to new Group 5 of this service bulletin. Also, an FAA AD is added to this service bulletin, and the Maintenance Planning Data (MPD) information is changed.
At the revision of this service bulletin, related Boeing Service Bulletin 737-26-1122 has been elevated to an Alert status. Anywhere in this bulletin where 737-26-1122 is used, 737-26A1122 may be used.
These sections were changed:
1. In Summary:
a. Background, added Service Related Problem (SRP) number.
b. Compliance, added FAA AD statements.
2. In Paragraph 1.A.1., Airplanes:
a. Changed airplane applicability statement.
b. Removed a note.
c. Added Group 5 airplanes.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137Revision 2: January 27, 2020 5 of 31
3. In Paragraph 1.B., Concurrent Requirements, added service bulletin revision levels and Group 5 information.
4. In Paragraph 1.C., Reason, added SRP number, revision statement and Information Notice (IN).
5. In Paragraph 1.D., Description, added revision statement.
6. In Paragraph 1.E., Compliance:
a. Added FAA AD statements.
b. Table 1, Compliance Time, changed compliance time to effective date of AD.
c. Added Table 2 for Group 5 compliance time.
7. In Paragraph 1.F., Approval, added Alternative Method of Compliance (AMOC) statement and approval statement for non-EASA models.
8. In Paragraph 1.J.1., Existing Data, changed NPRM to FAA AD and added SRP number.
9. In Paragraph 1.K., Publications Affected, changed the number of the Maintenance Planning Data (MPD) reference.
The data given in Information Notice 737-26A1137 IN 01 is included in this revision.
Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity and format changes, to show the location of all content changes.
Pages with no vertical lines have no changes.
REVISION HISTORY May 22, 2014Original Issue:
August 28, 2015Revision 1:
January 27, 2020Revision 2:
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137Revision 2: January 27, 2020 6 of 31 BOEING SERVICE BULLETIN 737-26A1137
ALERTALERT
Commercial Airplanes 737 Service Bulletin ALERT SummaryNumber: 737-26A1137Original Issue: May 22, 2014 Revision 2: January 27, 2020 ATA System: 2616 2127 SUBJECT: FIRE PROTECTION - Cargo Bay Smoke Detection - Equipment Cooling System Smoke Clearance Mode Operational Test for Cargo Smoke Protection
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.
CONCURRENT REQUIREMENTS Refer to Paragraph 1.B., Concurrent Requirements.
BACKGROUND This service bulletin gives instructions to do the Smoke Clearance Mode - Operational Test at repeat intervals on airplanes equipped with the reconfigurable low pressure air distribution system during a cargo fire event. The repeat operational testing of the equipment cooling system and low pressure environmental control system will reduce the probability of a latent failure which, in conjunction with a cargo fire event, could result in smoke in the flight deck and possible loss of aircraft control.
A review by Boeing found that there was no maintenance procedure available to inspect the components used to reconfigure the air distribution system to the cargo fire mode. A cargo fire event in conjunction with a latent failure of the air distribution system can possibly result in smoke penetration to occupied areas. The amount of smoke and toxicity of the smoke that could reach the occupied areas is unknown.
Boeing Service Bulletins 737-26-1121 and either 737-21-1135 or 737-21-1163 are related to 737-26-1122.
Accomplishment of the changes in the Boeing Service Bulletins 737-26-1121, 737-21-1135 or 737-21-1163 will not cause a failure of the test in this service bulletin. Boeing Service Bulletin 737-26A1083 is related to 737-21-1135.
Boeing Service Related Problem (SRP) 737-SRP-26-0079, 737NG-SRP-26-0088 are related to this service bulletin.
This table is provided to operators for planning purposes only. Refer to the applicable sections for more information.
ReferenceAffectedPlanning Data Paragraph 1.A.2., Spares AffectedNoSpares Affected Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137Revision 2: January 27, 2020 7 of 31
ReferenceAffectedPlanning Data Paragraph 1.E., Compliance and Paragraph
1.F., Approval YesAD Related Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Paragraph 1.K., Publications AffectedYesPublications Affected Paragraph 1.K., Publications AffectedNoAirplane Flight Operations Affected (Flight Crew Operations Manual and/or FAA Approved Airplane Flight Manual) Paragraph 2.C.1., Kits/PartsNoKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator NoOperator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin NoSpecial Tooling Required ACTION Get access into the flight compartment and main electronics equipment compartment. As an alternate location to the flight compartment to make sure of the recirculation fan's operation, between the left and right air conditioning pack compartments, open the access panel to the ground conditioned air connection duct. Do the Smoke Clearance Mode - Operational Test to make sure the Cargo Fire Protection system operates correctly.
If the Smoke Clearance Mode - Operational Test result is not satisfactory, do the troubleshooting procedure on the equipment cooling system and low pressure environmental control system to find and replace faulty components.
EFFECTIVITY All 737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER Airplanes. Refer to Paragraph 1.A., Effectivity, for the list of affected airplanes.
COMPLIANCE Federal Aviation Administration (FAA) Airworthiness Directive AD 2016-04-06 is related to this service bulletin.
The effective date of AD 2016-04-06 is April 1, 2016.
The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory.
Refer to Paragraph 1.E., Compliance.
INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the Operational Test given in this service bulletin.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137Revision 2: January 27, 2020 8 of 31 BOEING SERVICE BULLETIN 737-26A1137
ALERTALERT
MANPOWER Elapsed HoursTotal Task HoursAirplanes
2.504.00Each 737 Airplane
MATERIAL INFORMATION None.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137Revision 2: January 27, 2020 9 of 31 BOEING SERVICE BULLETIN 737-26A1137
ALERTALERT
ALERT Original Issue: May 22, 2014 Revision 2: January 27, 2020 BOEING SERVICE BULLETIN 737-26A1137 ALERT
IN FLIGHT COMPARTMENT AND MAIN ELECTRONICS EQUIPMENT COMPARTMENT:
-DO SMOKE CLEARANCE MODE
OPERATIONAL TEST -IF TEST RESULTS NOT SATISFACTORY
TROUBLESHOOT SYSTEM COMPONENTS BELOW AC MIX AIR COMPARTMENT:
-AS AN ALTERNATE LOCATION TO FLIGHT
COMPARTMENT TO MAKE SURE OF RECIRCULATION FAN'S OPERATION, OPEN ACCESS PANEL 191E -MAKE SURE THERE IS AIR FLOW DURING SMOKE
CLEARANCE MODE TEST 2302407 Export Controlled ECCN: 9E991 - BOEING 737-26A1137 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 10 of 31
Commercial Airplanes 737 Service Bulletin ALERT Number: 737-26A1137 Original Issue: May 22, 2014 Revision 2: January 27, 2020 ATA System: 2616 2127 SUBJECT: FIRE PROTECTION - Cargo Bay Smoke Detection - Equipment Cooling System Smoke Clearance Mode Operational Test for Cargo Smoke Protection
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.
1. PLANNING INFORMATION A. Effectivity
1. Airplanes This bulletin is applicable to 737-600, 737-700, 737-700C, 737-800, 737-900, 737-900ER Airplane(s), line number(s) 1-2598, 2600-2721, 2723-2813, 2815-2930, 2932-3068, 3070-3323, 3325-3425, 3427-3521, 3523-3611, 3613-3701, 3703-3791, 3793-3878, 3880-3915, 3917-3968, 3970-4013, 4015-4054, 4056-4098, 4100-4140, 4142-4180, 4182-4218, 4220-4255, 4257-4293, 4295-4330, 4332-4365, 4367-4398, 4400-4444, 4446-4480, 4482-4546, 4548-4608, 4610-4672, 4674-4727, 4729-4767, 4769-4812, 4814-4858, 4860-4897, 4899-4937, 4939-4977, 4979-5019, 5021-5057, 5059-5097, 5099-5137, 5139-5177, 5179-5217, 5219-5261, 5263-5297, 5299-5337, 5339-5367, 5369-5397, 5399-5427, 5429-5457, 5459-5477, 5479-5509, 5511-5541, 5543-5566, 5568-5586, 5588-5601, 5603-5622, 5624-5655, 5657-5667, 5669-5679, 5681-5711, 5713-5727, 5729-5739, 5741-5764, 5766-5787, 5789-5795, 5797-5822, 5824-5850, 5853-5879, 5881-5901, 5904-5935, 5937-5947, 5949-5962, 5964-5991, 5994-6019, 6021-6033, 6035-6047, 6049-6073, 6075, 6077-6103, 6105-6113, 6115-6131, 6133-6153, 6155-6159, 6161-6187, 6190-6215, 6217-6221, 6223-6243, 6245-6249, 6251-6271, 6274-6289, 6291-6299, 6301-6307, 6309-6325, 6327, 6329-6343, 6345-6355, 6357-6359, 6361-6371, 6373-6383, 6386-6395, 6397-6407, 6409-6411, 6413-6419, 6421-6429, 6431-6439, 6442-6447, 6449-6455, 6457-6463, 6465-6467, 6469-6471, 6473-6480, 6482-6489, 6491, 6493-6498, 6500-6507, 6509-6514, 6516-6520, 6522-6527, 6529-6531, 6533-6534, 6536-6541, 6543-6547, 6549-6554, 6556-6559, 6561, 6563-6568, 6570-6574, 6576-6581, 6583-6588, 6590-6593, 6596-6597, 6599-6602, 6604-6606, 6608-6611, 6613-6615, 6617-6620, 6622, 6624, 6626-6629, 6631-6633, 6635-6638, 6640-6642, 6644-6647, 6649-6651, 6653-6656, 6659-6660, 6662-6665, 6667-6671, 6673-6676, 6678-6680, 6682-6685, 6688-6689, 6691-6694, 6696-6698, 6700-6703, 6705-6707, 6709-6712, 6714-6716, 6718-6719, 6721, 6723-6725, 6727-6730, 6732-6734, 6736-6739, 6741-6743, 6745-6748, 6751-6752, 6754-6757, 6759-6761, 6763-6766, 6768-6770, 6772-6775, 6777-6779, 6781-6782, 6786-6788, 6790-6791, 6793, 6795, 6797, 6799-6802, 6804, 6806, 6808-6809, 6811, 6813, 6815, 6817-6818, 6820, 6822-6824, 6826-6827, 6829, 6831-6833, 6835-6836, 6838, 6840, 6842, 6844-6845, 6847, 6849, 6851, 6853-6854, 6856-6858, 6860, 6862-6863, 6865, 6867, 6869-6871, 6873-6874, 6878-6880, 6882-6883, 6885, 6887-6889, 6891-6892, 6894, 6896, 6898, 6900-6903, Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137Revision 2: January 27, 2020 11 of 31
6905, 6907, 6910, 6912-6914, 6916, 6918-6919, 6921, 6923-6925, 6927-6928, 6930, 6932-6934, 6936-6937, 6939, 6943, 6945-6948, 6950, 6952, 6954-6955, 6957-6959, 6961-6962, 6964, 6966-6967, 6969, 6971-6972, 6977, 6979, 6981-6982, 6984, 6986-6987, 6989, 6992, 6994, 6996-6997, 6999, 7001-7002, 7007, 7009, 7011-7012, 7014, 7016-7017, 7019, 7021-7022, 7024, 7026, 7029, 7031-7032, 7034, 7036-7037, 7039, 7041, 7046-7047, 7049, 7051-7052, 7054, 7056-7057, 7059, 7061, 7063, 7066-7067, 7069, 7071-7072, 7076, 7078, 7081-7082, 7084, 7086-7087, 7089, 7091-7092, 7094, 7097, 7099, 7101-7102, 7104, 7106-7107, 7109, 7112, 7116-7117, 7119, 7121-7122, 7124, 7126-7127, 7129, 7131, 7134, 7136-7137, 7139, 7141-7142, 7146, 7149, 7151-7152, 7154, 7156-7157, 7159, 7161-7162, 7164, 7167, 7169, 7171-7172, 7174, 7176-7177, 7179, 7182, 7187, 7189, 7191, 7194, 7197, 7199, 7202, 7204, 7206, 7209, 7212, 7214, 7217, 7221, 7224, 7227, 7229, 7232, 7234-7235, 7239, 7242, 7244, 7247, 7249, 7251, 7257, 7259, 7262, 7264, 7266, 7269, 7272, 7274, 7277, 7279-7280, 7284, 7287, 7292, 7294, 7297, 7299, 7302, 7304, 7307, 7309, 7312, 7314, 7317, 7319, 7322, 7327, 7329, 7332, 7334, 7337, 7339, 7342, 7344, 7347, 7349, 7352, 7354, 7357, 7362, 7364, 7367, 7369, 7372, 7374, 7377, 7379, 7382, 7387, 7397, 7402, 7407, 7412, 7417, 7422, 7432, 7437, 7442, 7447, 7452, 7457, 7467, 7472, 7477, 7482, 7487, 7492, 7502, 7507, 7512, 7517, 7522, 7527, 7537, 7542, 7547, 7552, 7557, 7562, 7572, 7577, 7582, 7587, 7592, 7597, 8592, 9103 in 5 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.
Refer to Service Bulletin Index Document D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.
The Variable Numbers and Group Information for the applicable airplanes is given below.
NOTE: The Variable Number table below includes all affected airplanes up to Line Number 9103.
Affected airplanes after Line Number 9103 will be added to the service bulletin's MyBoeingFleet.com (MBF) "get effectivity" result when they are added to the MBF Fleet Profile Page.
DESCRIPTIONCONFIGURATIONGROUP 737-600/-700/-800 Line Numbers 1 Through 1700 Included in Boeing Service Bulletin 737-26-1122, except for 737-700 Line Numbers 481, 545, 684, 979, 1089, 1211, and 1223.
-1 Airplane Line Numbers 1 Through 1700 Included in Boeing Service Bulletin 737-26-1122 and Had Not Accomplished Boeing Service Bulletin 737-26-1122, except for 737-700 Line Numbers 481, 545, 684, 979, 1089, 1211, and 1223.
1 Airplane Line Numbers 1 Through 1700 Included in Boeing Service Bulletin 737-26-1122 and Had Accomplished Boeing Service Bulletin 737-26-1122, except for 737-700 Line Numbers 481, 545, 684, 979, 1089, 1211, and 1223.
2 737-700/-700C/-900 Line Numbers 1 Through 1700 Not Included in Boeing Service Bulletin 737-26-1122, except for 737-700 Line Numbers 481, 545, 684, 979, 1089, 1211, and 1223.
-2 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: May 22, 2014 737-26A1137Revision 2: January 27, 2020 12 of 31 BOEING SERVICE BULLETIN 737-26A1137