# SDR TWAA9904012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 14, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N987Z](https://openairdocs.org/aircraft/N987Z), registered now
- Make and model: Doug DC-9-31
- Registry model: [Doug DC-9-31](https://openairdocs.org/model/douglas-dc-9-31) (OpenAirDocs)
- Aircraft serial: 47137
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Bolt
- Condition: Corroded
- Location: Right Mlg
- 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/TWAA9904012

## Discrepancy

DURING OP 16 MAINT CHECK, FOUND RT MAIN LANDING GEAR PULLEY QUADRANT ON FWD O/B BULKHEAD CABLE GUIDE PIN HAD CORRODED BOLT AND NUT.  REPLACED BOLTS AND BUSHINGS AND CLEANED LARGE GUIDE PINS, AND REPLACED SMALL GUIDE PINS PER SPM 6-30-7.

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