Service difficulty report · Window Frame · Boeing 7377H4

Difficulty date
May 22, 2026
Submitted
July 2, 2026
Operation
Air carrier
Aircraft
N929WN
Make and model
Boeing 7377H4
Aircraft serial
36631
Aircraft time
58,054 hours, 35,506 cycles
Part
Window Frame
Condition
Cracked
Location
Zone 200
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

CAPTAINS #1 WINDOW FRAME HAS CRACK IN LOWER INBOARD CORNER<[01] ACCOMPLISHED HFEC SURFACE SCAN OF SUSPECTED CRACKED LOCATION IAW 737 NDTM PART 6 CHAPTER 51-00-00 PROCEDURE 23. REMOVED SKIN PANEL 141A3816-9 TO F.O.M I.A.W SRM 51-40-02-0G-0. INSTALLED FASTENER PER EA 26-153-01448-WIP2. PERFORMED A HARD ALIGNMENT VERIFICATION PER SMM 34-36-00 AND VERIFIED ALIGNMENT IS WITHIN RANGE LESS THAN 10 (RADIANS) ACTUAL READING IS 8 RADIANS. VERIFIED SERVICEABILITY OF THE HUD MOUNT BRACKET AND THE INSTALLATION PER DRAWING REQUIREMENTS 141A8870 REV-. REPAIR ACCOMPLISHED IAW EA 26-153-01448.;

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