# SDR ASAA2026081568666

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 15, 2026
- Submitted: September 15, 2026
- Operation: Air carrier
- Aircraft: [N474AS](https://openairdocs.org/aircraft/N474AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 40715
- Aircraft time: 41,075 hours, 12,860 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Support
- Part number: 147A5660U3
- 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/ASAA2026081568666

## Discrepancy

UPON REMOVAL OF DAMAGED LAV MOUNT FITTINGS FOUND LAV SUPPORT LBL 20 STA 947 TO 967 CORRODED. GROUNDED - YES. REMOVED CORROSION & FOUND OUT OF LIMITS IAW BOEING 737-900ER SRM 53-70-51-1A-1. REMOVED & REPLACED LAV MOUNT SUPPORT INTERCOSTAL IAW BOEING 737-900ER SRM 51-40-02-0G-0 STEP 7, 51-40-05-0G-0 STEP 4 (W- .800O= .210 R= .181 L= .900 D= .029.

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