# SDR 0401296638

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 20, 2004
- Submitted: August 11, 2004
- Operation: Air carrier
- Aircraft: N638US
- Make and model: Boeing 747251B
- Aircraft serial: 23549
- Aircraft time: 71,671 hours, 9,436 cycles
- Engine: Pwa JT9D7R4G2
- System (JASC): [5420 · Nacelle/Pylon Miscellaneous Structure](https://openairdocs.org/jasc/5420)
- Part: Web
- Condition: Cracked
- Location: Nr 3 Pylon
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/0401296638

## Discrepancy

DURING (H) CHECK FOUND CRACK IN NR 3 PLYON ENGINE MOUNT BULKHEAD WEB. REPAIRED IAW EA 66-165162.

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