Service difficulty report · Threshold · Boeing 737990

Difficulty date
August 10, 2014
Submitted
August 26, 2014
Operation
Air carrier
Aircraft
N309AS
Make and model
Boeing 737990
Aircraft serial
30857
Aircraft time
47,445 hours, 18,326 cycles
Part
Threshold
Part number
654A000358
Condition
Corroded
Location
Bs 440-492
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

FWD CARGO DOOR THRESHOLD HAS NUMEROUS CORRSION SPOTS AROUND FASTENERS. ACFT GROUNDED. REMOVED CORROSION ON FWD CARGO DOOR CUT OUT LOWER SILL WEB, ORIGINAL MATERIAL THICKNESS 0.056, MATERIAL LOSS .010, MAX ALLOWABLE LOSS 0.005, MATERIAL REMAINING 0.046, AREA OUT OF LIMITS IAW SRM 53-30-15-1A-1. REMOVED WEB IAW SRM 51-40-02. LOCATED AND DRILLED NEW WEB IAW BAC DWG 143A8122. INSTALLED WEB IAW SRM 51-40-02. REMOVED DOT.