# SDR AALA20111228TUL01

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 28, 2011
- Submitted: January 10, 2012
- Operation: Air carrier
- Aircraft: [N472AA](https://openairdocs.org/aircraft/N472AA), registered now
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 49647
- Aircraft time: 67,683 hours, 35,673 cycles
- System (JASC): [5534 · Vertical Stabilizer Miscellaneous Structure](https://openairdocs.org/jasc/5534)
- Part: Doubler
- Condition: Damaged
- Location: Vertical Stab
- Stage of operation: IN
- How discovered: U
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20111228TUL01

## Discrepancy

COUNTERSINK FASTENER HOLE ON VERTICAL STABILIZER, STATION ZFS=52 LEFT LOWER DOUBLER AREA HAS DIVOT ON OUTER CIRCUMFERENCE OF COUNTERSINK.  INSTALLED DOUBLER REPAIR PER SRM 55-03-00 FIGURE 31.

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