# SDR ASAA2026020964518

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2026
- Submitted: February 25, 2026
- Operation: Air carrier
- Aircraft: [N494AS](https://openairdocs.org/aircraft/N494AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41729
- Aircraft time: 8 hours, 7 cycles
- System (JASC): [5345 · Fuselage, Equipment Attach Fittings](https://openairdocs.org/jasc/5345)
- Part: Intercostal
- Part number: 147A5660U22
- Part serial: NSN
- Condition: Corroded
- Location: Zone 200
- 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/ASAA2026020964518

## Discrepancy

RIGHT AFT LAV MOUNT INTERCOSTAL IS CORRODED FOUND WHILE WORKING 947 FRAME CORROSION. GROUNDED - YES. LOCATED AND DRILLED NEW INTERCOASTAL IAW BOEING 737-900ER SRM 51-40-05-0G-0. REMOVAL ANED INSTALL MAINTENANCE PERFORMED ON AAR MIG-5 OK456722 W/O 1023835 2000 0171W- .500" O- .090 R- .000 L- .650" D- .090.

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