- Difficulty date
- April 10, 2024
- Submitted
- April 23, 2024
- Operation
- Air carrier
- Aircraft
- N303AS
- Make and model
- Boeing 737990
- Aircraft serial
- 30016
- Aircraft time
- 74,789 hours, 30,311 cycles
- Part
- Skin
- Part number
- 147A31103
- Condition
- Corroded
- Location
- Fuselage
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAV DRAIN PORT HAS CORROSION LOWER SIDE OF DRAIN. GROUNDED - YES. REPAIRED DAMAGE AT LOWER LAV DRAIN PORT IAW B737-900 SRM 53-70-01-2R-3 CATEGORY B REPAIR INSPECTION REQUIREMENTS INSPECTION THRESHOLD 50,000 FLIGHT CYCLES AND REPEAT INSPECTION INTERVALS EVERY 5,000 FLIGHT CYCLES IAW B737-900 SRM 53-70-01-2R-3 TABLE 202W=.75" O=.125 R=.089 L=2.0" D=.036.