Service difficulty report · Beam · Boeing 7377H4

Difficulty date
July 13, 2021
Submitted
August 2, 2021
Operation
Air carrier
Aircraft
N962WN
Make and model
Boeing 7377H4
Aircraft serial
36963
Aircraft time
33,006 hours, 20,057 cycles
Part
Beam
Condition
Corroded
Location
Bs 259
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 FLIGHT DECK LATERAL BEAM BS 259.5; LBL 5; WL 208 (MARKED) ; / [01] REMOVED CORROSION IN A 1.2' X 0.6' AREA; MAX DEPTH OF BLENDOUT .006' PER SRM 51-10-02-0G-0; MEASURED WITH MICROMETER CAL ID: IS000461 S/N: 67126205 CAL DATE: 01/2021. ORIGINAL THICKNESS IS .094' PER DWG 141A7434. FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS GIVEN IN SRM.; [02] VERIFIED REMOVAL OF CORROSION IN A 1.2' X 0.6' AREA; MAX DEPTH .006' PER SRM 51-10-02-0G-0; MEASURED WITH CAL ID: IS000461 SN: 67126205. ORIGINAL THICKNESS IS .094' PER DWG 141A7434; OUT OF LIMITS DUE TO NO LIMITS GIVEN IN SRM.; [03] REMOVED NUTPLATE AT BS 259.5; LBL 5; WL 208 PER SRM 51-40-02-0G-0; [04] HFEC INSPECTED BLENDED AREA AND OPEN (NUTPLATE) HOLE PER 737NDT PART 6 51-00-00 PROCEDURES 23 AND 16. NO CRACKS FOUND. CAL ID IS000450 S/N N500D000M120071; [05] REFER TO FAULT TTG8Q005S5ZL FOR REPAIR RESOLUTION.; [06] STEP 5 ENTERED IN ERROR; [07] CARD COMPLETED ON ENGINEERING 21-153-02007; [08] VERIFIED CARD COMPLETED ON ENGINEERING 21-153-02007

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