Service difficulty report · Strap · Boeing 7377H4

Difficulty date
May 20, 2021
Submitted
June 28, 2021
Operation
Air carrier
Aircraft
N207WN
Make and model
Boeing 7377H4
Aircraft serial
34012
Aircraft time
52,378 hours, 31,227 cycles
Part
Strap
Condition
Corroded
Location
Fwd Crgo Doorway
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 FWD CARGO DOOR SURROUND STRUCTURE; INTERNAL FWD VERTICAL STRAP; RBL25 TO RBL27; BS440; WL158 TO WL159 ; AREA BETWEEN S-25R AND S-26R / [01] REMOVED CORROSION ON INNER FAIL SAFE STRAP AT B.S 440 RBL 25-27 WL 158-159.W 1' & L 3' PER SRM 53-30-15-15-1.; [02] REMOVED CORROSION ON INNER FAIL SAFE STRAP AT B.S 440 RBL 25-27 WL 158-159.W 1' & L 3' PER SRM 53-30-15-1A-1; [03] VERIFIED CORROSION REMOVAL ON INNER FAIL SAFE STRAP AT B.S 440 RBL 25-27 WL 158-159.W 1' & L 3' PER SRM 53-30-15-1A-1; [04] UT THICKNESS TESTED BLENDED AREA PER 737NDT PART 4 51-00-00 PROCEDURE 2. LOWEST REMAINING THICKNESS IS .130'. CAL ID ATS2342 E650; [05] REMOVED FWD VERTICAL STRAP AT BS 440 DUE WAS FOUND OUT OF LIMIT IAW SRM 51-40-02; [06] REPLACEMENT OF FWD VERTICAL STRAP RBL 25 TO RBL 27 BS 440 WL 158-WL 159 WAS PERFORMED ON TTG8Q0054E9D; [07] VERIFIED REPLACEMENT OF FWD VERTICAL STRAP RBL 25 TO RBL 27 BS 440 WL 158-WL 159 WAS PERFORMED ON TTG8Q0054E9D; [08] ALL NDT STEPS COMPLETE; [09] VERIFIED CARD COMPLETE.

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