# SDR CALA2021091301560

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 11, 2021
- Submitted: September 13, 2021
- Operation: Air carrier
- Aircraft: [N17122](https://openairdocs.org/aircraft/N17122), registered now
- Make and model: Boeing 757224
- Aircraft serial: 27564
- Aircraft time: 87,627 hours, 21,288 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Flange
- Part number: 148N31388000
- Condition: Corroded
- Location: Apu Inlet Door
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2021091301560

## Discrepancy

(B757-49-3-8084) THE INTERIOR FLANGE IS CORRODED AND CRACKED, FOR THE APU AIR INLET DOOR ASSY., AT THE FWD O/B EDGE AND THE O/B AFT EDGE, VIEWED SITTING ON TOP OF THE HOR. STAB. CENTER BOX, LO OKING UP.

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