A md-80 first officer discovered both the main and alternate trim inoperative upon leveling at cruis...

Attributes
ACN	1199741
Time
Date	201409
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Horizontal Stabilizer Trim
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Commercial
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

The first officer was flying the act. During level off at the cruise altitude FL240 the first officer said the primary trim was not working. Then he tried to use the alternate trim switches. The trim did not move. I then attempted to trim using the primary trim switches on the captain yoke. The trim did not move. We consulted the QRH for stabilizer inoperative in flight. After checking all referenced circuit breakers and the stabilizer trim (red guarded) were normal. Step six requires a check of the primary longitudinal trim. It operated normally. The QRH says at this point to continue normal operation. We were ready for descent to our filed destination at this time. Although normal operation was restored; I felt it prudent to [advise ATC] and expedite our arrival. We flew a visual approach and landed uneventfully.

Original NASA ASRS Text

Title: A MD-80 First Officer discovered both the Main and Alternate trim inoperative upon leveling at cruise. The QRH was completed but all systems appeared normal; then prior to descent both trim systems became operational. An uneventful landing ensued.

Narrative: The First Officer was flying the act. During level off at the cruise altitude FL240 the First Officer said the primary trim was not working. Then he tried to use the alternate trim switches. The trim did not move. I then attempted to trim using the primary trim switches on the Captain yoke. The trim did not move. We consulted the QRH for stabilizer Inoperative In Flight. After checking all referenced circuit breakers and the Stabilizer Trim (Red Guarded) were normal. Step six requires a check of the primary longitudinal trim. It operated normally. The QRH says at this point to continue normal operation. We were ready for descent to our filed destination at this time. Although normal operation was restored; I felt it prudent to [advise ATC] and expedite our arrival. We flew a visual approach and landed uneventfully.

Data retrieved from NASA's ASRS site 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.

A md-80 first officer discovered both the main and alternate trim inoperative upon leveling at cruise. The QRH was completed but all systems appeared normal; then prior to descent both trim systems became operational. An uneventful landing ensued.