# SDR TWAA0008709

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 24, 2000
- Submitted: June 5, 2000
- Operation: Air carrier
- Aircraft: [N921L](https://openairdocs.org/aircraft/N921L), 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: 47107
- Aircraft time: 80,344 hours, 86,616 cycles
- System (JASC): [5400 · Nacelle/Pylon Structure](https://openairdocs.org/jasc/5400)
- Part: Intercostal
- Condition: Cracked
- Location: Nr 2 Pylon
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TWAA0008709

## Discrepancy

DURING OP 16 MAINT CHECK, NUMBER 2 PYLON INTERCOSTAL WAS CRACKED OFF TOP 6 INCHES FROM FUSELAGE, BOTTOM AFT OF PYLON INTERIOR, AFT END.  REMOVED CRACKED INTERCOSTAL.  FABRICATED REPAIR PER SRM 53-01 PAGE 8.  HEAT TREATED REPAIR DOUBLER 2024, 0.050 TO 2024-T3 PER 51-10-2A.  MATERIAL SUBSTITUTION PER 51-60-0.  SEALED PER SRM 51-20-00.

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