<< >> NASA ASRS Report 249780, August 1993

Air carrier PIC tells of heading track deviation during a night operation IAP VOR approach in proximity of designated mountainous terrain.

Attributes
ACN	249780
Time
Date	199308
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : gua
State Reference	FO
Altitude	msl bound lower : 8000 msl bound upper : 8000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : gua tower : gua
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent : approach landing : missed approach
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 8000
ASRS Report	249780
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course flight crew : became reoriented
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While on the VOR 1 approach to gua, flight deviated from the published course. Aircraft returned to the VOR for a second VOR approach. Scattered rain and cumulus were in the approach area and a concern to the crew. The crew after deviating for WX tried to save the approach and began from an improper position and was unable to capture the course and remain within a safe DME to assure terrain clearance. Crew coordination poor WX, and radio and language problems were all factors. No traffic conflict was reported and aircraft landed without incident. The problem could have been avoided if the crew had not tried to save a bad approach by beginning from an improper position. Radio, language and WX were contributing, but not the major problem.

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Original NASA ASRS Text

Title: ACR PIC TELLS OF HDG TRACK DEV DURING A NIGHT OP IAP VOR APCH IN PROX OF DESIGNATED MOUNTAINOUS TERRAIN.

Narrative: WHILE ON THE VOR 1 APCH TO GUA, FLT DEVIATED FROM THE PUBLISHED COURSE. ACFT RETURNED TO THE VOR FOR A SECOND VOR APCH. SCATTERED RAIN AND CUMULUS WERE IN THE APCH AREA AND A CONCERN TO THE CREW. THE CREW AFTER DEVIATING FOR WX TRIED TO SAVE THE APCH AND BEGAN FROM AN IMPROPER POS AND WAS UNABLE TO CAPTURE THE COURSE AND REMAIN WITHIN A SAFE DME TO ASSURE TERRAIN CLRNC. CREW COORD POOR WX, AND RADIO AND LANGUAGE PROBS WERE ALL FACTORS. NO TFC CONFLICT WAS RPTED AND ACFT LANDED WITHOUT INCIDENT. THE PROB COULD HAVE BEEN AVOIDED IF THE CREW HAD NOT TRIED TO SAVE A BAD APCH BY BEGINNING FROM AN IMPROPER POS. RADIO, LANGUAGE AND WX WERE CONTRIBUTING, BUT NOT THE MAJOR PROB.

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.