Air carrier widebody transport track heading deviation WX avoidance on extended over water operation...

Attributes
ACN	190091
Time
Date	199109
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : org
State Reference	FO
Altitude	msl bound lower : 31000 msl bound upper : 31000
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : rorg artcc : zny
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 4 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : other oceanic enroute : pacific enroute airway : r224 enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 193 flight time total : 7110 flight time type : 2410
ASRS Report	190091
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	inflight encounter : weather non adherence : clearance other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Due to a typhoon there was considerable turbulence and WX along our route of flight. In an effort to deviate around thunderstorms we flew 15 mi east of our course for approximately 50 mi. At this time we were not in radar contact, however, we were in high frequency communications with naha radio. At the time we made mandatory position report at sabgu intersection, captain notified them that we were 15 mi east of course. They requested that we return back on R224 as per flight plan. I requested the captain to mention to them the reason for our deviation. He felt it unnecessary and declined to inform naha radio the reason for our deviation. In retrospect I believe it would be important to advise whoever the controling agency is that our flight will be deviating off course due to WX prior to such action.

Original NASA ASRS Text

Title: ACR WDB TRACK HDG DEV WX AVOIDANCE ON EXTENDED OVER WATER OP.

Narrative: DUE TO A TYPHOON THERE WAS CONSIDERABLE TURB AND WX ALONG OUR RTE OF FLT. IN AN EFFORT TO DEVIATE AROUND TSTMS WE FLEW 15 MI E OF OUR COURSE FOR APPROX 50 MI. AT THIS TIME WE WERE NOT IN RADAR CONTACT, HOWEVER, WE WERE IN HIGH FREQ COMS WITH NAHA RADIO. AT THE TIME WE MADE MANDATORY POS RPT AT SABGU INTXN, CAPT NOTIFIED THEM THAT WE WERE 15 MI E OF COURSE. THEY REQUESTED THAT WE RETURN BACK ON R224 AS PER FLT PLAN. I REQUESTED THE CAPT TO MENTION TO THEM THE REASON FOR OUR DEV. HE FELT IT UNNECESSARY AND DECLINED TO INFORM NAHA RADIO THE REASON FOR OUR DEV. IN RETROSPECT I BELIEVE IT WOULD BE IMPORTANT TO ADVISE WHOEVER THE CTLING AGENCY IS THAT OUR FLT WILL BE DEVIATING OFF COURSE DUE TO WX PRIOR TO SUCH ACTION.

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.