SDR SWAA2020052643415

Service difficulty report · Crease Beam · Boeing 7377H4

Difficulty date: April 16, 2020
Submitted: May 26, 2020
Operation: Air carrier
Aircraft: N922WN
Make and model: Boeing 7377H4
Aircraft serial: 32461
Aircraft time: 41,140 hours, 24,679 cycles
System (JASC): 5310 · Fuselage Main, Structure
Part: Crease Beam
Condition: Corroded
Location: Fuselage
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

CABIN FLOOR RIGHT CREASE BEAM WEB STA 727D+6' RBL 68.5 WL 208 LOWER SURFACE HAS CORROSION JUST OUTBOARD OF LIGHTNING HOLE. BLENDED CORROSION ON RT CREASE BEAM WEB PN 146A5925-24 AT STA 727D+6' RBL 68.5 WL208. LOWER SURFACE ORIGINAL THICKNESS .036', LOSS .005', REMAINING .031' FOUND OUT OF LIMITS IAW SRM 53-60-13-1A-1 FIG 103 DETAIL C. REMOVED, FABRICATED AND INSTALLED NEW WEB IAW SRM 51-40-02-0G-0 AND DRAWING 146A5900. WEB WAS FORMED AND HEAT TREATED ON WORK ORDER 40849-2700-0001 PN 146A5925-24.

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