Service difficulty report · Skin · Boeing 7377H4

Difficulty date
May 1, 2022
Submitted
June 14, 2022
Operation
Air carrier
Aircraft
N286WN
Make and model
Boeing 7377H4
Aircraft serial
32471
Aircraft time
57,746 hours, 34,276 cycles
Part
Skin
Condition
Cracked
Location
R/H Horiz. Stab.
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

CRACK FOUND AT RIGHT HORIZONTAL STABILIZER LOWER SKIN STAB STA 193.90 ;9.5' FROM REAR SPAR ;I/B FASTENER ROW.CRACK LENGTH = 0.781' CRACK FOUND AT RIGHT HORIONTAL STABILIER LOWER SKIN STAB STA 193.90 9.5' FROM REAR SPAR I/B FASTENER ROW.CRACK LENGTH = 0.781' / REMOVED PAINT BY STRIPPING AT RT HORIZ STAB LOWER SKIN STA 193.90 ON DAMAGED AREA REF B37-700 AMM 51-21-11-150-810.; CUT OUT DAMAGED AREAS (2EA) AT RT HORIZ STAB LOWER SKIN STA 193.90 9.5' FROM REAR SPAR AND STA 193.90 17.5' FROM REAR SPAR REF B737-700 SRM 51-10-02-0G-0 AND 55-10-01-2R-11.;[06] PERFORMED HFEC INSP ON 2 EA CUT OUTS. IAW B 737 NDT PART 6 51-00-00 PROCE 23. TOOL NORTEC 600. BC 166316. CALIBN DUE 10-8-22. NO CRACKS FOUND.EVALUATED SURFACE ROUGHNESS FOUND TO BE SMOOTHER THAN 63 MICRO-INCHES RA ON (2EA) CUT OUT AREAS REF B737-700 SRM 55-10-01-2R-11.737-700 SRM 51-10-02-0G-0.;[10] OK TO TREAT AND PRIME REPAIR AREA REPAIR PARTS.;[11] TREATED AND PRIMED ON REPAIR AREA AND REPAIR PARTS IAW B 737-700 SRM 51-20-01-0G-0.;APPLIED TOP COAT AT REPAIR AREA RT HORZ STAB LOWER SKIN REF B737-700 AMM 51-21-73-370-803 REPAIR OF DAMAGES ON SKIN AT RT HORZ STAB STA 193. 90 WAS ACCOMPLISHED ON ATTACHED EA 22-155-01413. THIS REPAIR ALSO COVERS CRACK REPORTED ON FAULT TTG8Q00C7HPU;[16] FINAL INSPECTION; REPAIR OF DAMAGES ON SKIN AT RT HORZ STAB STA 193. 90 WAS ACCOMPLISHED ON ATTACHED EA 22-155-01413. THIS REPAIR ALSO COVERS CRACK REPORTED ON FAULT TTG8Q00C7HPU

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