SDR AALA20150415001

Service difficulty report · Pcu · Boeing 737823

Difficulty date: April 14, 2015
Submitted: April 16, 2015
Operation: Air carrier
Aircraft: N886NN
Make and model: Boeing 737823
Aircraft serial: 33223
Aircraft time: 10,338 hours, 4,027 cycles
System (JASC): 2730 · Elevator Control System
Part: Pcu
Condition: Bypassing
Location: Zone 300
Stage of operation: CR
How discovered: O
Nature of condition: F
Precautionary procedure: B

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

What was found

JUST PRIOR TO TOP OF DESCENT AT FL 410 TREMENDOUS AMOUNT OF FORE & AFT PLAY IN THE CONTROL COLUMN WITH AUTO PILOT ON. DESCENDING THROUGH LOWER ALTITUDES SYMPTOMS IMPROVED BUT STILL PLAY IN THE CONTROL COLUMN & ELEVATOR WAS STILL FEELING SOFT. EMERGENCY DECLARED, LANDING UNEVENTFUL. FOUND RT ELEVATOR PCU BYPASSING. R & R RT ELEVATOR PCU IAW AMM 27-31-14-401. PERFORMED LEAK CHECK. SYS CHECKED NORMAL.