19981010043089I

Incident

FAA incident report · Doug DC-9-31 · Philadelphia, PA · October 10, 1998

Date
October 10, 1998
Place
Philadelphia, PA
Airport
Philadelphia International
Phase of flight
Normal Cruise
Operating rules
Air carrier (Part 121)
Operator
USAA
Aircraft
N991VJ
Reported as
Doug DC931
Pilot’s flight hours
14,876 total10,931 in this make and model184 in the last 90 days

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-5) The flight crew stated that they were enroute from Washington national airport (dca) to logan international airport (bos). The flight crew diverted and landed at Philadelphia International Airport (phl) on runway 27L due to a rudder problem. The flight crew also stated that approximately, twenty-three minutes into flight during climb the aircraft experienced uncommanded yaw to the left. Followed by oscillation to the right and left of 10 degrees. This occurred with autopilot in the on and off positions. The flight crew followed all precautionary procedures for uncommanded yaw. The flight crew landed the aircraft safely with 7 degrees left rudder trim, rudder power control in the manual position, and the autopilot rudder servo in the off position. There were no injury to the passengers or flight crew personnel during landing. Us airways maintenance personnel inspected flight controls and found no faults. Maintenance personnel decided to remove and replace the yaw damper actuators. The system was adjusted and tested on the ground by maintenance personnel, system ops checked and tested good. The flight crew was tasked to functional check the yaw damper system. The yaw damper system met the requirements for cat ii status and the functional check was satisfactory. The aircraft has been returned to service. The us airways ppm and the NTSB have been contacted concerning the above matter. This case is considered closed.

As the FAA filed it

(-5) THE FLIGHT CREW STATED THAT THEY WERE ENROUTE FROM WASHINGTON NATIONAL AIRPORT (DCA) TO LOGAN INTERNATIONAL AIRPORT (BOS). THE FLIGHT CREW DIVERTED AND LANDED AT PHILADELPHIA INTERNATIONAL AIRPORT (PHL) ON RUNWAY 27L DUE TO A RUDDER PROBLEM. THE FLIGHT CREW ALSO STATED THAT APPROXIMATELY, TWENTY-THREE MINUTES INTO FLIGHT DURING CLIMB THE AIRCRAFT EXPERIENCED UNCOMMANDED YAW TO THE LEFT. FOLLOWED BY OSCILLATION TO THE RIGHT AND LEFT OF 10 DEGREES. THIS OCCURRED WITH AUTOPILOT IN THE ON AND OFF POSITIONS. THE FLIGHT CREW FOLLOWED ALL PRECAUTIONARY PROCEDURES FOR UNCOMMANDED YAW. THE FLIGHT CREW LANDED THE AIRCRAFT SAFELY WITH 7 DEGREES LEFT RUDDER TRIM, RUDDER POWER CONTROL IN THE MANUAL POSITION, AND THE AUTOPILOT RUDDER SERVO IN THE OFF POSITION. THERE WERE NO INJURY TO THE PASSENGERS OR FLIGHT CREW PERSONNEL DURING LANDING. US AIRWAYS MAINTENANCE PERSONNEL INSPECTED FLIGHT CONTROLS AND FOUND NO FAULTS. MAINTENANCE PERSONNEL DECIDED TO REMOVE AND REPLACE THE YAW DAMPER ACTUATORS. THE SYSTEM WAS ADJUSTED AND TESTED ON THE GROUND BY MAINTENANCE PERSONNEL, SYSTEM OPS CHECKED AND TESTED GOOD. THE FLIGHT CREW WAS TASKED TO FUNCTIONAL CHECK THE YAW DAMPER SYSTEM. THE YAW DAMPER SYSTEM MET THE REQUIREMENTS FOR CAT II STATUS AND THE FUNCTIONAL CHECK WAS SATISFACTORY. THE AIRCRAFT HAS BEEN RETURNED TO SERVICE. THE US AIRWAYS PPM AND THE NTSB HAVE BEEN CONTACTED CONCERNING THE ABOVE MATTER. THIS CASE IS CONSIDERED CLOSED.

Other reports on N991VJ · 1

Matched to the same aircraft by N-number and date.