SDR FDEA202107041676

Service difficulty report · Fan · Boeing 777FHT

Difficulty date: July 4, 2021
Submitted: August 31, 2021
Operation: Air carrier
Aircraft: N842FD
Make and model: Boeing 777FHT
Aircraft serial: 38969
Aircraft time: 39,657 hours, 6,005 cycles
System (JASC): 2121 · Air Distribution Fan
Part: Fan
Condition: Failed
Location: Recirculation
Stage of operation: NR
How discovered: O
Nature of condition: O, O, O
Precautionary procedure: K, O, O, O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

RH LOWER RECIRCULATION FAN IS CREATING VERY LOAD HUMING SOUND DURING OPERATION. FOUND R/H RECIRCULATION FAN INBOARD FILTER DEFORMED AND DRAWN DOWN INTO THE R/H RECIRCULATION FAN. REMOVED AND REPLACED R/H RECIRCULATION FAN REF M.M. 21-25-07-4, OPS CK NORMAL, REMOVED AND REPLACED R/H RECIRCULATION FAN FILTERS REF M.M. 21-25-08-4. ALSO C/W L/H RECIRCULATION FAN FILTER REPLACEMENT REF B777 M.M. 21-25-08-4, RECIRCULATION SYSTEM OPS CK NORMAL REF M.M. 21-25-00-5.

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