# SDR CALA2026020913631

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 4, 2026
- Submitted: February 9, 2026
- Operation: Air carrier
- Aircraft: [N37437](https://openairdocs.org/aircraft/N37437), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 33532
- Aircraft time: 51,947 hours, 18,550 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Transition Panel
- Part number: 143A7501189
- Condition: Corroded
- Location: Zone 100
- 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/CALA2026020913631

## Discrepancy

B737-MP-20FW-53-820-00: FWD CARGO COMPARTMENT L/H TRANSITION PANEL FROM STA 500C+15 TO 500L LBL 21.0 IS CORRODED. TRANSCRIBED FROM AAR GSO NON-ROUTINE 9286411  THE CORRODED AREA ON TRANSITION PNL FROM STA 500C+15 TO 500K LBL 21 FOUND TO BE 100% MATERIAL LOSS IN MULTIPLE AREAS IAW ER SRM 53-00-53-1A-2 FIG 103, REMOVED DAMAGE TRANSITION PNL FROM FWD CARGO STA 500C+15 TO STA 500J+10 LBL21 IAW SRM 51-40-02 MATERIAL ID FOR NEW TRANSITION PNL AND NEW SPLICE IS PN BAC 1496-444 7075 T6 EXTRUSION PO: 1138312.1 IAW B737-900ER 53- 00-53-2R-5 TABLE 201, TRIMED AND LOCATED+DRILLED 1EA TRANSITION PNL AND 1EA SPLICE IAW SRM 53-00-53-2R-5 AND IAW B737-900ER SRM 51-40-05, ALODINED AND PRIMED 1EA TRANSITION PNL AND 1EA SPLICE IAW SRM 51-20-01, INSTALLED 1EA TRANSITION PNL AT FWD CARGO STA 500C+15 TO STA 500J+10 LBL 21 AND INSTALLED 1EA SPLICE AT FWD CARGO STA 500K TO 500J LBL 21 IAW SRM 53-00-53-2R-5 AND IAW B737-900ER SRM 51-40-02 INSTALLED NUTPLATES ON TRANSITION PNL AND SPLICE AND CURE TIME COMPLETED 24HRS IAW BAC DWG #140N4500 REMOVED DOT #X905

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