Air carrier medium large transport deviates below glide slope and act MSAW.

Attributes
ACN	105122
Time
Date	198902
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : den
State Reference	CO
Altitude	msl bound lower : 7500 msl bound upper : 7500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : den tower : sat
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer pilot : cfi
Experience	flight time last 90 days : 90 flight time total : 2800 flight time type : 90
ASRS Report	105122
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe non adherence : published procedure other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Aircraft vectored to final, autoplt engaged and captured localizer 26L at 2500'. First officer observed G/south indicator and used G/south information to call for flaps and gear. Captain called 'capture' and first officer confirmed as aircraft started to descend. Captain reset altitude for missed approach and first officer looked up at mode control panel to check all settings. First officer looked back at raw data to find aircraft descending too rapidly and going well below G south. Disengaged autoplt, started adding power and raising nose prior to call from approach control to check altitude. Aircraft is newest in fleet, about one week old. Autoplt was entered in log book as unsatisfactory by crew. Two man crew a directly contributing factor. Too many things happening on final during critical phases of flight.

Original NASA ASRS Text

Title: ACR MLG DEVIATES BELOW GLIDE SLOPE AND ACT MSAW.

Narrative: ACFT VECTORED TO FINAL, AUTOPLT ENGAGED AND CAPTURED LOC 26L AT 2500'. F/O OBSERVED G/S INDICATOR AND USED G/S INFO TO CALL FOR FLAPS AND GEAR. CAPT CALLED 'CAPTURE' AND F/O CONFIRMED AS ACFT STARTED TO DSND. CAPT RESET ALT FOR MISSED APCH AND F/O LOOKED UP AT MODE CONTROL PANEL TO CHK ALL SETTINGS. F/O LOOKED BACK AT RAW DATA TO FIND ACFT DSNDING TOO RAPIDLY AND GOING WELL BELOW G S. DISENGAGED AUTOPLT, STARTED ADDING PWR AND RAISING NOSE PRIOR TO CALL FROM APCH CTL TO CHK ALT. ACFT IS NEWEST IN FLEET, ABOUT ONE WEEK OLD. AUTOPLT WAS ENTERED IN LOG BOOK AS UNSATISFACTORY BY CREW. TWO MAN CREW A DIRECTLY CONTRIBUTING FACTOR. TOO MANY THINGS HAPPENING ON FINAL DURING CRITICAL PHASES OF FLT.

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