# SDR AT9900839

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 17, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N822AT](https://openairdocs.org/aircraft/N822AT), registered now
- Make and model: Doug DC-9-32
- Registry model: [Doug DC-9-32](https://openairdocs.org/model/mcdonnell-douglas-dc-9-32) (OpenAirDocs)
- Aircraft serial: 47274
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Oxygen Mask
- Condition: Failed
- Location: Row 18 Def
- 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/AT9900839

## Discrepancy

DURING OXYGEN MASK INSPECTION TO COMPLY WITH EO 9-3520-29-E1461, PASSENGER OXYGEN MASKS ABOVE SEAT 18DEF DID NOT DEPLOY.  PERFORMED OPERATIONAL CHECK OF OXYGEN MASK DROP AT ROW 18 DEF PER MM 35-20.  RESULTS GOOD PER MM 35-20.

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