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A cessna 525B aircraft experienced a pitch trim jam after level off. Aircraft out of trim with electric and manual pitch trim inoperative.
| Attributes | |
| ACN | 768702 |
| Time | |
| Date | 200801 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 15000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Citationjet C525/C526 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 18000 flight time type : 1000 |
| ASRS Report | 768702 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : commercial pilot : cfi pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 100 flight time total : 3285 flight time type : 285 |
| ASRS Report | 768433 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | other |
| Factors | |
| Maintenance | performance deficiency : installation performance deficiency : repair |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft in maintenance at FBO at ZZZ. Cleared a write up concerning pitch trim indicator -- loose on shaft. On takeoff and climb out; pitch trim operated normal. Autoplt engaged on level off at 15000 ft MSL. Autoplt out of trim. Autoplt disconnected and aircraft out of trim and electrical and manual pitch trim inoperative. Returned to ZZZ and on approximately base leg; electric and manual pitch trim began to work normal. However; pitch trim indicator was then inoperative. Overweight landing at ZZZ. Suspect that after maintenance or climb out; there was some type of jam in pitch trim system that cleared itself with continued pressure on manual pitch trim wheel. Maintenance discovered that in the process of gluing the black tip onto the shaft of the trim indicator shaft; glue dripped onto gears that control the trim and caused the trim to jam as it rotated forward.
Original NASA ASRS Text
Title: A CESSNA 525B ACFT EXPERIENCED A PITCH TRIM JAM AFTER LEVEL OFF. ACFT OUT OF TRIM WITH ELECTRIC AND MANUAL PITCH TRIM INOP.
Narrative: ACFT IN MAINT AT FBO AT ZZZ. CLEARED A WRITE UP CONCERNING PITCH TRIM INDICATOR -- LOOSE ON SHAFT. ON TKOF AND CLB OUT; PITCH TRIM OPERATED NORMAL. AUTOPLT ENGAGED ON LEVEL OFF AT 15000 FT MSL. AUTOPLT OUT OF TRIM. AUTOPLT DISCONNECTED AND ACFT OUT OF TRIM AND ELECTRICAL AND MANUAL PITCH TRIM INOP. RETURNED TO ZZZ AND ON APPROX BASE LEG; ELECTRIC AND MANUAL PITCH TRIM BEGAN TO WORK NORMAL. HOWEVER; PITCH TRIM INDICATOR WAS THEN INOP. OVERWT LNDG AT ZZZ. SUSPECT THAT AFTER MAINT OR CLB OUT; THERE WAS SOME TYPE OF JAM IN PITCH TRIM SYSTEM THAT CLEARED ITSELF WITH CONTINUED PRESSURE ON MANUAL PITCH TRIM WHEEL. MAINT DISCOVERED THAT IN THE PROCESS OF GLUING THE BLACK TIP ONTO THE SHAFT OF THE TRIM INDICATOR SHAFT; GLUE DRIPPED ONTO GEARS THAT CONTROL THE TRIM AND CAUSED THE TRIM TO JAM AS IT ROTATED FORWARD.
Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.