# SDR 99ZZZX2222

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 21, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N53FP](https://openairdocs.org/aircraft/N53FP), registered now
- Make and model: Cessna 550
- Registry model: [Cessna 550](https://openairdocs.org/model/cessna-550) (OpenAirDocs)
- Aircraft serial: 5500434
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Oxygen Mask
- Part number: C3512000
- Condition: Damaged
- Location: Cabin
- Part time: 8,500 hours
- Component: Puritanbenet
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX2222

## Discrepancy

WHILE INSPECTING OXYGEN MASKS PER AD 99-08-21, 5 MASKS WERE FOUND TORN WITH MFG DATES FROM 1979 TO 1983.  SAME DEFECT AS INDICATED IN THE AD/BULLETIN.  ANOTHER ACFT IN FLEET WAS CHECKED AND MORE DEFECTIVE MASKS WERE FOUND.  NONE HAD CURE DATES LISTED IN THE AD.

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