# SDR P5CA0000184

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 15, 2000
- Submitted: May 31, 2000
- Operation: Air carrier
- Aircraft: [N921FT](https://openairdocs.org/aircraft/N921FT), registered now
- Make and model: Boeing 747283B
- Aircraft serial: 21575
- Aircraft time: 52,980 hours, 11,966 cycles
- Engine: Pwa JT9D70A
- Engine time: 15,949 hours, 3,316 cycles
- System (JASC): [7250 · Turbine Section](https://openairdocs.org/jasc/7250)
- Part: Flange
- Condition: Cracked
- 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/P5CA0000184

## Discrepancy

NR 4 ENG R FLANGE CRACK AT 7 O''CLOCK POSITION ON LIGHTENING HOLE.  NR 2 ENG TURBINE COOLING CRACKED AT 10 O''CLOCK POSITON.  REPAIRED PER MM 72-09-71, REP 8.

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