Aircraft differences in same type--different models require different procedures for autoplt use.

Attributes
ACN	145387
Time
Date	199005
Day	Thu
Place
Locale Reference	atc facility : bos
State Reference	MA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zbw
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute airway : zbw
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : atp pilot : instrument
Experience	flight time last 90 days : 150 flight time total : 10000 flight time type : 500
ASRS Report	145387
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : overshoot non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

Operation of autoplt/altitude setting procedures on same type, different model aircraft with different autoplt; i.e. Different model aircraft require different procedures. Too many differences for crews to change from one aircraft to the other. These aircraft should be kept separate and flown by separately trained crews. This is a serious safety problem.

Original NASA ASRS Text

Title: ACFT DIFFERENCES IN SAME TYPE--DIFFERENT MODELS REQUIRE DIFFERENT PROCS FOR AUTOPLT USE.

Narrative: OPERATION OF AUTOPLT/ALT SETTING PROCS ON SAME TYPE, DIFFERENT MODEL ACFT WITH DIFFERENT AUTOPLT; I.E. DIFFERENT MODEL ACFT REQUIRE DIFFERENT PROCS. TOO MANY DIFFERENCES FOR CREWS TO CHANGE FROM ONE ACFT TO THE OTHER. THESE ACFT SHOULD BE KEPT SEPARATE AND FLOWN BY SEPARATELY TRAINED CREWS. THIS IS A SERIOUS SAFETY PROBLEM.

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.