Service difficulty report · Skin · Boeing 737824

Difficulty date
February 1, 2026
Submitted
February 9, 2026
Operation
Air carrier
Aircraft
N13227
Make and model
Boeing 737824
Aircraft serial
28788
Aircraft time
79,671 hours, 30,207 cycles
Part
Skin
Part number
146A3239
Condition
Corroded
Location
Zone 100
Part time
79,656 hours, 30,200 cycles
Stage of operation
IN
How discovered
V
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

NEW INNER LAV PAN STRUCTURE REQUIRES HOLES LOCATED AND DRILLED. REF LPN 7696962DISASSEMBLED OLD LAV PAN ASSY TO USE AS A TEMPLATE REF SRM 51-40-02 2 EA CLIPS, 1 EA SHIM, AND 1EA ZEE CHANNEL BENT/DAMAGED MARKED MAJOR AND RII REF LPN 7696962. THIS LOGPAGE IS A BUILD UP OF THE 146A7402-4 INTERCOSTAL ASSY STATED IN STEP D-5 OF AVO 16543 REV B. UPDATED SDR AND SFR TO MATCH PARENT LOGPAGE LOCATED AND DRILLED INNER PAN ASSY AND REPLACED #1 AND #4 ZEE CHANEL REF SRM 51-40-02, STILL NEED TO FABRICATE 2 EA CLIPS, 1 EA SHIM. ENTRY TO CLEAR"IP" FOR MORE REQUIRED UPDATES. MATERIAL VERIFICATION FOR 2 CLIPS AND 4 Z CHANEL STRAPS TO BE FABRICATED VERFIED MATERIL FOR FABRICTION OF CLIPS AND "Z" CHNNEL STRAPS. MATERIAL ON P.O.#4281882911 FABRICATED 2 CLIPS AND 4 Z CHANEL STRAPS REF SRM 51-40-05 AND DWG 146A7406 FABRICATED 2 CLIPS AND 4 Z CHANEL STRAPS REF SRM 51-40-05 AND DWG 146A7406 REQUESTING OK TO INSTALL 6 CLIPS ON INTERCOSTAL ASSY OK TO INSTALL THE 6 CLIPS TO INNERCOASTAL ASSY. BEGAN ASSEMBLING 146A7402-4 INTERCOSTAL ASSY WET WITH BMS 5-95 REF DWG 146A7400-4, DWG 146A7402, SRM 51-40-02. CLIPS AT INTERCOSTAL MARKED 1 CAN BE INSTALLED AFTER FITTINGS SECURING PAN TO THE STRUCTURE ARE LOCATED, DUE TO SHIM. NEED MATERIAL VERIFICATION TO MANUFACTURE CLIP 2024-T3 .032 MANUFACTURED PART WITH P.O. 8524137 IAW SRM 51-30-01 VERIFIED PROPER 2024 T3 CLAD MATERIAL FOR INTERCOSTAL DOUBLER PER DWG PART 146A7408-5 AND ALL RII INSPECTION REQUIREMENTS MET ON PREVIOUS UPDATES. LOG PG OK TO CLOSE