# SDR P5CA0300785

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 31, 2003
- Submitted: April 2, 2003
- Operation: Air carrier
- Aircraft: [N921FT](https://openairdocs.org/aircraft/N921FT), registered now
- Make and model: Boeing 747283B
- Aircraft serial: 21575
- Aircraft time: 59,142 hours, 13,270 cycles
- Engine: Pwa JT9D70A
- Engine time: 40,627 hours, 8,945 cycles
- System (JASC): [7520 · Engine Cooling System](https://openairdocs.org/jasc/7520)
- Part: Tube
- Part number: 773863
- Condition: Ruptured
- Location: Nr 4 Engine
- 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/P5CA0300785

## Discrepancy

NR 4 ENG 13TH STAGE TURBINE CASE COOLING DUCT RUPTURED AND BLEW THRU LT REVERSER HALF.  REPLACED 13TH STAGE COOLING DUCT & LT REVERSER HALF.

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