What was found
NR 1 PACK IS PUTTING OUT 50 DEGREE AIR, FOUND A 8" CRACK IN NR 1 HEAT EXCHANGER. FOUND CRACK IN HEAT EXCHANGER. REPLACED HEAT EXCHANGER ASSEMBLY. IAW MM21-51-02 RAN BOTH PACKS NO DEFECTS NOTED. AC OK FOR SERVICE.
- Difficulty date
- May 26, 2008
- Submitted
- July 15, 2008
- Operation
- Air carrier
- Aircraft
- N646UA
- Make and model
- Boeing 767322
- Aircraft serial
- 25283
- Aircraft time
- 71,021 hours, 11,639 cycles
- Engine
- Pwa PW4060
- System (JASC)
- 2150 · Cabin Cooling System
- Part
- Heat Exchanger
- Part number
- 1942704
- Part serial
- UNK
- Condition
- Cracked
- Location
- Nr 1 A/C Pack
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.