Service difficulty report · Structure · Boeing 7377H4

Difficulty date
July 29, 2021
Submitted
September 14, 2021
Operation
Air carrier
Aircraft
N491WN
Make and model
Boeing 7377H4
Aircraft serial
33867
Aircraft time
53,758 hours, 31,898 cycles
Part
Structure
Condition
Corroded
Location
Bs 700 Lbl 63
Stage of operation
IN
How discovered
9
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

CORROSION ON INNER CHORD AT PASSENGER CABIN BS700 LBL63 WL208. ; / [01] REMOVED CORROSION ON INNER CHORD AT BS. 700 LBL 63 WL 208 PER SRM 51-10-02-0G-0 STEP 15; [02] REMOVED 1 EACH FASTENER AT BS.700 LBL 63 WL 208 PER SRM 51-40-02-0G-0; [03] INNER CHORD AT BLENDED AREA FOUND TO BE OUT OF LIMITS AT BS 700 LBL 63 WL 208 DUE TO NO ALLOWABLE LIMITS IN SRM; [04] VERIFIED CORROSION EVALUATION FOUND TO BE OUT OF LIMITS DUE TO NO ALLOWABLE DAMAGE PER SRM 51-10-02.; [05] LIMIT STATEMENT:INNER CHORD DAMAGE BS700 LBL63 WL208 FOUND TO BE OUT LIMITS DUE TO NO ENTRIES FOUND ON SRM PART TO BE REPLACE I.A.W SRM 51-10-02-0G-0 PAR 9.C; [06] VERIFIED NO LIMITS IN THE SRM- PART TO BE REPLACED; [07] INNER CHORD TO BE REPLACED ON CARD # TTG8Q005ZHW9; [08] VERIFIED PART REPLACEMENT ON TTG8Q005ZHW9; [09] CORRECTED CORROSION LEVEL TO BE LEVEL TWO FOR ITEM 21; [10] CERTIFIED

More about the Boeing 737-7H4