Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Santa Ana, California 92707
Wednesday, October 10, 2001 16:27 PDT
NTSB Narrative Summary Released at Completion of Accident
The flight crew experienced a jammed horizontal stabilizer trim actuator during the takeoff initial climb. The pilot reported that after takeoff, during climb out, the "STAB OUT OF TRIM" annunciator light illuminated. The crew disengaged the autopilot and found the electric trim control inoperative at both the pilot and co-pilot positions, and the manual trim control was jammed and immovable. The crew leveled the airplane at 13,000 feet and accomplished the "Stabilizer Out of Trim" and "Jammed Stabilizer" checklists to no avail. The crew declared an emergency with air traffic control, and made an otherwise uneventful landing at Los Angeles. According to the pilot, the trim manual control was jammed and immobile. Post flight examination revealed the horizontal stabilizer trim actuator motor was seized. The actuator motor was subsequently replaced with a serviceable unit, and the aircraft was ferried to Seattle for inspection. No other faults were found in the pitch trim system and the airplane was returned to service. Further examination of the actuator motor revealed that the motor was mechanically seized. According to a representative of Boeing Aircraft Company, with the motor seized, in order to manually trim the stabilizer, it would have been necessary for the flight crew to exert sufficient force on the trim wheel to cause the motor clutch to slip in addition to the force necessary to overcome normal system friction.
NTSB Probable Cause Narrative
The failure of the stabilizer electric trim motor as a result of internal mechanical seizure.
Event Information
| Type of Event | Incident |
| Event Date | 10/10/2001 |
| Event Day of the Week | Wednesday |
| Time of Event | 1627 |
| Event Time Zone | Pacific Daylight Time |
| Event City | Santa Ana |
| Event State | CALIFORNIA |
| Event Country | -- |
| Zipcode of the event site | 92707 |
| Event Date Year | 2001 |
| Event Date Month | 10 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 340000N |
| Event Location Longitude | 1180000W |
| Event Location Airport | -- |
| Event Location Nearest Airport ID | -- |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | -- |
| Weather Briefing Completeness | Full |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1653 Pacific Standard Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | SNA |
| Elevation of weather observation facility | 58 |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | PST |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | 20000 |
| Sky/Lowest/Cloud Conditions | Few |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 7 |
| Air Temperature at event time (in degrees celsius) | 21 |
| Dew Point at event time (in degress fahrenheit) | 16 |
| Wind Direction (degrees magnetic) | 240 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 6 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 29.97 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 87 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 19660 |
| NTSB Notification Source | |
| NTSB Notification Date | Oct 11 2001 12:00AM |
| NTSB Notification Time | 700 |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | May 30 2006 1:54PM |
| User who most recently changed record | NTSB\JOHB |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Los Angeles, California |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N615AS |
| NTSB Number | LAX02IA002 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 121: Air Carrier |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | No |
| Damage | None |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Boeing |
| Aircraft Model | 737-700 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 30344 |
| Certified Max Gross Weight | 154500 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 129 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | Oct 8 2001 12:00AM |
| Airframe hours since last inspection | 50 |
| Airframe Hours | 6250 |
| ELT Installed | No |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | Alaska Airlines, Inc. |
| Aircraft Owner Street Address | 19300 International Blvd. |
| Aircraft Owner City | Seattle |
| Aircraft Owner State | WA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 98188 |
| Operator is an individual? | No |
| Operator Name | -- |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | -- |
| Operator State | -- |
| Operator Country | -- |
| Operator Zip code | -- |
| Operator Code | ASAA |
| Owner has at least one certificate | -- |
| Other Operator of large aircraft? | -- |
| Certified for Part 133 or 137 Operation | -- |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | Passenger Only |
| Type of Flying (Per_Bus / Primary) | -- |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | Yes |
| Departure Airport Code | SNA |
| Departure City | Santa Ana |
| Departure State | CA |
| Departure Country | USA |
| Departure Time | 1625 |
| Departure Time Zone | PDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | SEA |
| Destination City | Seattle |
| Destination State | WA |
| Destination Country | USA |
| Specific Phase of Flight | Climb |
| Report sent to ICAO? | No |
| Evacuation occurred | No |
| Date of most recent change to record | Mar 7 2006 6:31PM |
| User who most recently changed record | RICJ |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | NA |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |