# SDR ASAA2019022528541

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 25, 2019
- Submitted: March 11, 2019
- Operation: Air carrier
- Aircraft: N318AS
- Make and model: Boeing 737990
- Aircraft serial: 30018
- Aircraft time: 55,891 hours, 22,184 cycles
- System (JASC): [5312 · Fuselage Main, Bulkhead](https://openairdocs.org/jasc/5312)
- Part: Bulkhead
- Part number: 111A13225
- Condition: Cracked
- Location: Lt Mlg Ww
- 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/ASAA2019022528541

## Discrepancy

LT WW FWD BULKHEAD AFT OF HEAT EXCHANGER UPPER CHORD IS CRACKED AT FASTENER HOLE. GROUNDED - YES. REPAIRED LT WW UPPER CHORD IAW EA 900 57EA 21324.

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