# SDR CALA2026021613773

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 10, 2026
- Submitted: February 16, 2026
- Operation: Air carrier
- Aircraft: [N77552](https://openairdocs.org/aircraft/N77552), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 67179
- Aircraft time: 10,270 hours, 3,385 cycles
- System (JASC): [5230 · Cargo/Baggage Doors](https://openairdocs.org/jasc/5230)
- Part: Skin
- Condition: Deformed
- Location: Zone 800
- 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/CALA2026021613773

## Discrepancy

ON WALK AROUND DAMAGE DISCOVERED AFT OF THE AFT CARGO DOOR. DAMAGE  IS LOCATED AT BS 863-867 AND BETWEEN STR 20R - 21R. DAMAGE IS APPROX 8.5" X 7"REMOVED RIVETS IN THE STRINGER 20R AND 21R AND IN THE SHEAR TIES IN THE DAMAGED AREA FOR REPAIR PREFORMED CUT OUT OF DAMAGED SKIN PER SRM 53-00-01-2R-36 PAR 4.C AND VERIFIED SKIN AROUND CUTOUT IS BACK TO INITIAL CONTOUR. REQUEST HFEC FOR CUTOUT, COUNTERSINKS AND HOLE PROBES PER PAR 4.E.1-4.E.3 ACP  B737 SRM 53-00-01-2R-36 STEP 4(E). IAW NTM PART 6-51-00-00 PROC. 23 , NTM PART 6-51-00-00 PROC. 16 AND NTM PART 6-53-30-00 PROC. 3 WITH NO DEFECTS. NEED TO VERIFY REPAIR MATERIALS IAW SRM 53-00-01-2R-36 TABLE 201 , VERIFIED REPAIR MATERIALS IAW SRM 53-00-01-2R-36, TABLE 201. LAYED OUT REPAIR FASTENER ROWS AND PILOT DRILLED ACFT IAW SRM 53-00-01-2R-36 CONTINUE FABRICATION OF ALL REPAIR PARTS, DRILLED & COUNTERSINK MOST HOLE, TRIM OUT DOUBLER & TRIPLE IAW SRM 53-00-01-2R-36. FABRICATED REPAIR PARTS IAW SRM 53-00-01-2R-36 STEPS H-M ,   ALSO REQUEST VERIFICATION OF CONICAL WASHERS INSTALLED PER STEP P . PERFORMED REQUIRED RII INSP & VERIFIED DRILL UP & FABRICATION IAW SRM 53-00-01-2R-36 STEPS H-M. OK TO ASKIN REPAIR COMPLETED REF SRM 53-00-01-2R-36.

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