# SDR CALA2026020413576

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 2026
- Submitted: February 6, 2026
- Operation: Air carrier
- Aircraft: [N2341U](https://openairdocs.org/aircraft/N2341U), registered now
- Make and model: Boeing 777-300ER
- Registry model: [Boeing 777-300ER](https://openairdocs.org/model/boeing-777-300er) (OpenAirDocs)
- Aircraft serial: 63721
- Aircraft time: 38,015 hours, 4,056 cycles
- System (JASC): [5247 · Auxiliary Power Unit (APU) Doors](https://openairdocs.org/jasc/5247)
- Part: Inlet Door
- Part number: 7340739001
- Part serial: 0133
- Condition: Inflt Separation
- Location: Zone 300
- Part time: 38,015 hours, 4,056 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/CALA2026020413576

## Discrepancy

WHILE TROUBLESHOOTING LP 7779489, DISCOVERED APU INLET DOOR ASSY MISSING,  DEPARTED ACFT DURING FLT FROM SFO TO HNL LOCKED APU DOOR EICAS STATUS APU INLET DOOR IS NOT IN COMMANDED POSITION. DB ELMS P310 ELECTRONIC UNIT, NO DAMAGE FOUND INSIDE INLET.  ACTUATOR ROD END BROKEN.  FOUND DENTS AFT OF APU DOOR, AT TOP OF TAIL CONE.  LONG DENT APPROX 10 IN., SMALL DENT ABOUT 3 IN.  PERFOMED A DETAILED INSPECTION OF THE GENERAL AREA NOTED OF CONCERN, ALSO FOUND UPPER FLANGE OF INTAKE ASSY & JUMPER DAMAGED. NO OTHER DAMAGES NOTED ON THE SURROUNDING STRUCTURE.   SEAL ON UPPER FLANGE TORN WIDE ANGLE,  DENTS AFT OF APU DOOR FOUND TO BE ALL WITHIN LIMITS IAW SRM 53-00-01-1A-1, TABLE A,  DETAIL E.  COMPLIED WITH  EC/RA 4915-01103. INSTALLED BLOCKING PLATE FOR INLET DOOR.  APU INLET DOOR ACTUATOR AT P310 PANEL REMAINS PULLED & COLLARED. PLACARD APPLIED.  R & R APU INLET DOOR ACTUATOR IAW AMM 49-15-06-000-801 & DISASSEMBLED INLET DOOR ACTUATOR FROM ASSY & AMM APU DOOR POSITION SWITCH INSTALLATION TEST CHK GOOD IAW AMM 49-15-02-400-801.

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