MD80 crew is concerned about high autoplt bank angles at altitude.

Attributes
ACN	713189
Time
Date	200610
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zob.artcc
State Reference	OH
Altitude	msl single value : 35000
Environment
Flight Conditions	VMC
Weather Elements	Thunderstorm
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	713189
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	713199
Events
Anomaly	aircraft equipment problem : less severe non adherence : published procedure non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

The pms was loaded prior to takeoff. Flying at FL330 the pms indicated the aircraft was light enough to climb to FL350. ATC reported 'no complaints' at FL350. So in order to 'save gas' we elected to climb. After deviating around a 'build up;' at FL350 in 'altitude hold;' ATC cleared us to a point (ewc). After engaging the FMS to that point; the aircraft rolled into a 27 degree bank at FL350. The aircraft acted unusually during the roll. The flight attendants asked what had just happened as the captain was already talking to them on the interphone. There was no altitude or airspeed loss. ATC did not call us for any deviation. Why can't the FMS be restr to 15 degrees of bank above a certain altitude?

Original NASA ASRS Text

Title: MD80 CREW IS CONCERNED ABOUT HIGH AUTOPLT BANK ANGLES AT ALT.

Narrative: THE PMS WAS LOADED PRIOR TO TKOF. FLYING AT FL330 THE PMS INDICATED THE ACFT WAS LIGHT ENOUGH TO CLB TO FL350. ATC RPTED 'NO COMPLAINTS' AT FL350. SO IN ORDER TO 'SAVE GAS' WE ELECTED TO CLB. AFTER DEVIATING AROUND A 'BUILD UP;' AT FL350 IN 'ALT HOLD;' ATC CLRED US TO A POINT (EWC). AFTER ENGAGING THE FMS TO THAT POINT; THE ACFT ROLLED INTO A 27 DEG BANK AT FL350. THE ACFT ACTED UNUSUALLY DURING THE ROLL. THE FLT ATTENDANTS ASKED WHAT HAD JUST HAPPENED AS THE CAPT WAS ALREADY TALKING TO THEM ON THE INTERPHONE. THERE WAS NO ALT OR AIRSPD LOSS. ATC DID NOT CALL US FOR ANY DEV. WHY CAN'T THE FMS BE RESTR TO 15 DEGS OF BANK ABOVE A CERTAIN ALT?

Data retrieved from NASA's ASRS site as of January 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.