# SDR TWAA0003912

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 5, 2000
- Submitted: April 13, 2000
- Operation: Air carrier
- Aircraft: N989Z
- Make and model: Doug DC-9-31
- Registry model: [Doug DC-9-31](https://openairdocs.org/model/douglas-dc-9-31) (OpenAirDocs)
- Aircraft serial: 47135
- Aircraft time: 77,008 hours, 82,903 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Intercostal
- Condition: Misdrilled
- Location: Bs 350 - 370
- Stage of operation: IN
- How discovered: O
- Nature of condition: W
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TWAA0003912

## Discrepancy

DURING OP 16 MAINT CHECK, INTERCOSTAL WAS DEFORMED AND HAD MISDRILLED HOLES AT STA 350 TO 370, RBL 6 INCHES.  REPLACED INTERCOSTAL PER 6-70-01, PAGE 3 AND DOUGLAS DRAWING 9957909.

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