Service difficulty report · Heat Exchanger · Boeing 7673S1

Difficulty date
July 20, 2014
Submitted
July 23, 2014
Operation
Air carrier
Aircraft
N640GT
Make and model
Boeing 7673S1
Aircraft serial
25221
Aircraft time
74,895 hours, 15,784 cycles
Part
Heat Exchanger
Part number
1942744
Part serial
112026
Condition
Cracked
Location
Lt A/C Pack
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

LEFT PACK REHEATER ASSEMBLY HEAT EXCHANGER HAS A .65 LONG CRACK IN THE FWD OTBD BOTTOM. R & R REHEAT EXCHANGER IAW AMM 21-51-07. R & R LOW LIMIT VALVE IAW AMM 21-51-11 & DUCT SEALS IAW AMM 21-51-11. LEAK & OPS CHECKED OK.

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