Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
July 31, 2022
Submitted
August 26, 2022
Operation
Air carrier
Aircraft
N8645A
Make and model
Boeing 7378H4
Aircraft serial
36907
Aircraft time
27,093 hours, 12,483 cycles
Part
Floorbeam
Condition
Damaged
Location
Fuselage
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

PASS CABIN TRANSVERSE FLOORBEAM STA 380 HAS SCRIBE MARK FROM LBL13-LBL21 / [01] BLENDED OUT THE SCRIBE MARK AT STA 380 THE TRANSVERSE FLOORBEAM UPPER SURFACE FROM LBL13-LBL21 AS PER SRM 51-10-02. IT IS WITHIN THE ALLOWABLE DAMAGE LIMIT AS PER SRM 53-10-51-1A-1 FIG. 105 DETAIL C. NOMINAL THICKNESS .125?; BLENDED OUT .003? AND THE REMAINING THICKNESS IS .122?.;[02] C/W HFEC OF BLENDED AREA PER BOEING 737 NDT MANUAL PART6; 51-00-00 PROC.23. NO DEFECTS NOTED.;[03] REMOVED SCRIBE MARK PER SRM 51-10-02. FOUND TO BE WITHIN ALLOWABLE DAMAGE LIMITS PER SRM 53-10-51-1A-1 FIG.105; DETAIL C. NOMINAL THICKNESS 0.125?; REMOVED 0.003?; REMAINING THICKNESS 0.122?. TREATED AND PRIMED PER SRM 51-20-01;[04] REMOVED SCRIBE MARK PER SRM 51-10-02. FOUND TO BE WITHIN ALLOWABLE DAMAGE LIMITS PER SRM 53-10-51-1A-1 FIG.105; DETAIL C. NOMINAL THICKNESS 0.125?; REMOVED 0.003?; REMAINING THICKNESS 0.122?. TREATED AND PRIMED PER SRM 51-20-01

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