<< >> NASA ASRS Report 330710, March 1996

Flight crew using omega for navigation across gulf of mexico, encountered strong winds aloft about the time omega lost strong radio signals and continued navigation in direct route mode. ATC contacted flight crew notifying them they were 36 mi off course and issued a new clearance.

Attributes
ACN	330710
Time
Date	199603
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : zhu
State Reference	TX
Altitude	msl bound lower : 31000 msl bound upper : 31000
Aircraft 1
Controlling Facilities	artcc : zhu
Operator	common carrier : air carrier
Make Model Name	B727-200
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	330710
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Just south of barow intersection, ZHU advised we were in radar contact and that we were 36 mi west off course. At that time the omega was in direct route status. Winds at FL310 were 260 degrees at 100 KTS so I assume the omega overcompensated for the drift. At the time galveston NDB bearing was within acceptable bearing limits as it was oscillating and not steady on the station. Houston cleared us direct to croki intersection as is their normal action when we come into radar contact either north or south of barow intersection. Houston did not indicate there was any problem or conflict. In their words it was quote just for our information end quote.

Related reports:

• An air carrier widebody transport crew misloaded their navig...
• The reporter assisting the pilot with the radios and navigat...
• GA small aircraft lost navigation and communication radios a...
• An A320 flight crew encountered frozen mcdus and continued t...
• Small aircraft private aircraft on IFR flight plan encounter...
• PA28 pilot on a night VFR flight encountered IMC and request...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: FLC USING OMEGA FOR NAV ACROSS GULF OF MEXICO, ENCOUNTERED STRONG WINDS ALOFT ABOUT THE TIME OMEGA LOST STRONG RADIO SIGNALS AND CONTINUED NAV IN DIRECT RTE MODE. ATC CONTACTED FLC NOTIFYING THEM THEY WERE 36 MI OFF COURSE AND ISSUED A NEW CLRNC.

Narrative: JUST S OF BAROW INTXN, ZHU ADVISED WE WERE IN RADAR CONTACT AND THAT WE WERE 36 MI W OFF COURSE. AT THAT TIME THE OMEGA WAS IN DIRECT RTE STATUS. WINDS AT FL310 WERE 260 DEGS AT 100 KTS SO I ASSUME THE OMEGA OVERCOMPENSATED FOR THE DRIFT. AT THE TIME GALVESTON NDB BEARING WAS WITHIN ACCEPTABLE BEARING LIMITS AS IT WAS OSCILLATING AND NOT STEADY ON THE STATION. HOUSTON CLRED US DIRECT TO CROKI INTXN AS IS THEIR NORMAL ACTION WHEN WE COME INTO RADAR CONTACT EITHER N OR S OF BAROW INTXN. HOUSTON DID NOT INDICATE THERE WAS ANY PROB OR CONFLICT. IN THEIR WORDS IT WAS QUOTE JUST FOR OUR INFO END QUOTE.

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.