A cpr medium large transport crew overshot its altitude on descent.

Attributes
ACN	246732
Time
Date	199307
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : ftw
State Reference	IN
Altitude	msl bound lower : 27500 msl bound upper : 28000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	general aviation : corporate
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 100 flight time total : 9850 flight time type : 55
ASRS Report	246732
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : overshoot non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

ZOB had cleared cpr medium large transport from FL310 to FL280. Captain was flying the aircraft on autoplt. We descended approximately 500 ft below our assigned altitude (FL275), because the captain forgot to arm the autoplt altitude capture. ZOB queried us as to our altitude, and we immediately climbed back up to FL280. Additional factors: captain and first officer were not getting along too well on this trip. Captain had 'chewed out' first officer for giving a fuel load to maintenance without his specific authorization -- even though captain could not be reached when the decision on the fuel load had to be made! Captain is known for strong 'PIC' ego and rarely seeks input from fellow crew members. He is also the standardization captain and my senior. First officer felt out of place trying to help this individual before, during, and after this incident! Note: both crew members had attended cockpit resource management initial and refresher training. For this incident, it was a waste of time!

Original NASA ASRS Text

Title: A CPR MLG CREW OVERSHOT ITS ALT ON DSCNT.

Narrative: ZOB HAD CLRED CPR MLG FROM FL310 TO FL280. CAPT WAS FLYING THE ACFT ON AUTOPLT. WE DSNDED APPROX 500 FT BELOW OUR ASSIGNED ALT (FL275), BECAUSE THE CAPT FORGOT TO ARM THE AUTOPLT ALT CAPTURE. ZOB QUERIED US AS TO OUR ALT, AND WE IMMEDIATELY CLBED BACK UP TO FL280. ADDITIONAL FACTORS: CAPT AND FO WERE NOT GETTING ALONG TOO WELL ON THIS TRIP. CAPT HAD 'CHEWED OUT' FO FOR GIVING A FUEL LOAD TO MAINT WITHOUT HIS SPECIFIC AUTHORIZATION -- EVEN THOUGH CAPT COULD NOT BE REACHED WHEN THE DECISION ON THE FUEL LOAD HAD TO BE MADE! CAPT IS KNOWN FOR STRONG 'PIC' EGO AND RARELY SEEKS INPUT FROM FELLOW CREW MEMBERS. HE IS ALSO THE STANDARDIZATION CAPT AND MY SENIOR. FO FELT OUT OF PLACE TRYING TO HELP THIS INDIVIDUAL BEFORE, DURING, AND AFTER THIS INCIDENT! NOTE: BOTH CREW MEMBERS HAD ATTENDED COCKPIT RESOURCE MGMNT INITIAL AND REFRESHER TRAINING. FOR THIS INCIDENT, IT WAS A WASTE OF TIME!

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.