S80 flight crew overcome FMA equipment problem and return to assigned altitude.

Attributes
ACN	497860
Time
Date	200101
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zdv.artcc
State Reference	CO
Altitude	msl bound lower : 27000 msl bound upper : 27300
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdv.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Route In Use	enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	497860
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : fma other flight crewa
Resolutory Action	flight crew : returned to assigned altitude flight crew : overcame equipment problem flight crew : overrode automation
Consequence	other
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Aircraft

Narrative:

While leveling at FL270, the FMA went from altitude capture to mach hold. First officer's leg disconnected autoplt and hand flew aircraft to level flight. Maximum altitude obtained was FL273.

Original NASA ASRS Text

Title: S80 FLC OVERCOME FMA EQUIP PROB AND RETURN TO ASSIGNED ALT.

Narrative: WHILE LEVELING AT FL270, THE FMA WENT FROM ALT CAPTURE TO MACH HOLD. FO'S LEG DISCONNECTED AUTOPLT AND HAND FLEW ACFT TO LEVEL FLT. MAX ALT OBTAINED WAS FL273.

Data retrieved from NASA's ASRS site as of July 2007 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.