# SDR USAA991008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 9, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N412US
- Make and model: Boeing 737401
- Aircraft serial: 23881
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Condition: Cracked
- Location: Bs 727
- Part time: 32,103 hours
- 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/USAA991008

## Discrepancy

PHL/PIT - DURING UNSCHEDULED MAINTENANCE, PILOT REPORT IN PHL FOUND 1.125 INCH LONG CRACK IN SKIN AT STATION 727D AT STRINGER 25 RT.  INSTALLED EXTERNAL DOUBLER PER SRM 53-00-01, FIG L02, SH 3 AND EA 52813.  (M)

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