SDR UIEA2020111602399

Service difficulty report · A/C Pack · Boeing 767306

Difficulty date: November 14, 2020
Submitted: November 18, 2020
Operation: Air carrier
Aircraft: N1321A
Make and model: Boeing 767306
Aircraft serial: 27957
Aircraft time: 87,521 hours, 20,931 cycles
System (JASC): 2150 · Cabin Cooling System
Part: A/C Pack
Condition: Noisy
Location: Left
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.

What was found

OPERATING LEFT PACK UNUSUALLY LOUD WITH NORMAL DUCT PRESSURES OBSERVED. LOUD SQUEELING INTERMITTENT, COMMUNICATIONS BETWEEN PILOTS AND ATC AFFECTED, SELECTED LEFT PACK OFF. PERFORMED LT PACK INSPECTION, IAW AMM 21-51-00. NO LEAKS OR DEFECTS NOTED. PERFORMED OPERATIONS CHECK ON LT PACK, IAW AMM 21-00-00. FOUND GASPER MAKING LOUD NOISE IN SUPERNUMERARY SEATS, READJUSTED GASPER, IAW AMM 21-22-00. NO NOISE WITH LT PACK NOTED. OPERATIONS CHECK NORMAL.