What was found
DURING HCK, CORROSION WAS NOTED ON THE LT UPPER DECK EMERGENCY EXIT DOOR SILL, STA 685, STR 13L. ER/A 500558-14 SECTION I WAS COMPLETED AT THAT TIME. FOLLOW ON ACTION IS REQUIRED FOR THIRD STAGE APPROVAL.
- Difficulty date
- March 24, 2012
- Submitted
- March 29, 2012
- Operation
- Air carrier
- Aircraft
- N662US
- Make and model
- Boeing 747451
- Aircraft serial
- 23720
- Aircraft time
- 94,889 hours, 12,121 cycles
- System (JASC)
- 5320 · Fuselage Miscellaneous Structure
- Part
- Sill
- 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.