B727 crew came within 100 ft of flying into mountainous terrain on approach to mdst.

Attributes
ACN	611669
Time
Date	200312
Day	Mon
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : mdst.airport
State Reference	FO
Altitude	msl single value : 9500
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	descent : approach
Route In Use	approach : instrument non precision
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 130 flight time total : 5500 flight time type : 3000
ASRS Report	611669
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : company policies non adherence : clearance non adherence : far non adherence : published procedure other spatial deviation
Independent Detector	aircraft equipment : gpws other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action other
Miss Distance	vertical : 100
Supplementary
Problem Areas	ATC Human Performance Company FAA Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We had been on duty for 16 hours and were on the final phase of the approach. The ATC controller directed us to an intersection for a DME arc. Upon entering the intersection, we got a GPWS warning, executed an immediate go around, and climbed out immediately to the VOR and instead did a VOR approach. Items contributing to this were the controller's bad call and language and we being on duty for 16 hours. If we were not so tired, we would have caught the minimum altitude for the intersection. We came very close to being splattered all over the mountain side.

Original NASA ASRS Text

Title: B727 CREW CAME WITHIN 100 FT OF FLYING INTO MOUNTAINOUS TERRAIN ON APCH TO MDST.

Narrative: WE HAD BEEN ON DUTY FOR 16 HRS AND WERE ON THE FINAL PHASE OF THE APCH. THE ATC CTLR DIRECTED US TO AN INTXN FOR A DME ARC. UPON ENTERING THE INTXN, WE GOT A GPWS WARNING, EXECUTED AN IMMEDIATE GAR, AND CLBED OUT IMMEDIATELY TO THE VOR AND INSTEAD DID A VOR APCH. ITEMS CONTRIBUTING TO THIS WERE THE CTLR'S BAD CALL AND LANGUAGE AND WE BEING ON DUTY FOR 16 HRS. IF WE WERE NOT SO TIRED, WE WOULD HAVE CAUGHT THE MINIMUM ALT FOR THE INTXN. WE CAME VERY CLOSE TO BEING SPLATTERED ALL OVER THE MOUNTAIN SIDE.

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.