# SDR CALA2026020913629

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 2026
- Submitted: February 9, 2026
- Operation: Air carrier
- Aircraft: [N13227](https://openairdocs.org/aircraft/N13227), registered now
- Make and model: Boeing 737824
- Aircraft serial: 28788
- Aircraft time: 79,671 hours, 30,207 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- 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
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026020913629

## Discrepancy

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

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