# SDR 200200245

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 12, 2002
- Submitted: April 16, 2002
- Operation: Air carrier
- Filed by: [Marana Aerospace Solutions Inc, repair station ERKR675D](https://openairdocs.org/faa-repair-station/ERKR675D/marana-aerospace-solutions-inc.md) (OpenAirDocs)
- Aircraft: N477EV
- Make and model: Boeing 747-SR-46
- Registry model: [Boeing 747-SR-46](https://openairdocs.org/model/boeing-747-sr-46) (OpenAirDocs)
- Aircraft serial: 20784
- Aircraft time: 63,957 hours, 33,032 cycles
- Engine: Pwa JT9D7A
- System (JASC): [7830 · Engine Thrust Reverser](https://openairdocs.org/jasc/7830)
- Part: Vane
- Part number: 65B9751312
- Part serial: CBO2312
- 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/200200245

## Discrepancy

LEFT HAND NR 4 CASCADE VANE WAS CRACKED AT AFT ATTACH AREA.  REPLACED CASCADE VANE IN ACCORDANCE WITH B747 M/M 78-31-07.

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