Service difficulty report · Skin · Boeing 7377BD

Difficulty date
January 7, 2021
Submitted
January 28, 2021
Operation
Air carrier
Aircraft
N7724A
Make and model
Boeing 7377BD
Aircraft serial
36725
Aircraft time
36,671 hours, 19,328 cycles
Part
Skin
Condition
Corroded
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

CORROSION EXTERNAL SKIN AROUND SAFETY RELIEF VALVE CUT OUT BETWEEN BS 967 AND BS 987 AND BETWEEN STR 26R AND STR 27R AT LOWER FUSELAGE. REMOVED CORROSION LOC EXTERNAL SKIN AROUND SAFETY RELIEF VALVE CUT OUT BTW BS967 AND BS987 AND BTW STR26R AND STR27R AT LOWER FUSELAGE; EVALUATED REWORKED AREA AND FOUND WITHIN LIMITS I.A.W. B737-700 SRM 53-00-01-1A-1 PARAGRAPH 4B;ITEM 2 DETAIL C ALLOWABLE DAMAGE 1 MEASURE OF REWORKED AREA ARE: L=9.271'; W=5.428' TOOL USED CALIPER P/N: 500-197-30; S/N: A18229521 DUE DATE: 02 AUG 21 AND MINIMUM REMAINING THICKNESS ARE 0.057'

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