Track deviation on an ADF airway in the caribbean.

Attributes
ACN	305163
Time
Date	199505
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : cun
State Reference	FO
Altitude	msl bound lower : 35000 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : muha tower : swf
Operator	common carrier : air carrier
Make Model Name	DC-9 30
Operating Under FAR Part	Part 91
Navigation In Use	other ndb other ndb
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
Experience	flight time last 90 days : 190 flight time total : 22250 flight time type : 18500
ASRS Report	305163
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 13800 flight time type : 5000
ASRS Report	305164
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	flight crew : became reoriented 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 other
Situations
Navigational Aid	Unspecified

Narrative:

While navigating on BG46 we were asked if we were going direct robin intersection (intersection at UB881 and B646) at 194 mi from key west. Havana radar told us that we were 24 mi south of course. We were using both ADF's on fish hook. Both indicated we were navigating on course. We wrote up navigation system but nothing was found. I think we may have lost directional information even though we still had an identify. There may have been interference from cozumel 330 kz (fish hook 332 kz). We landed in cancun with no other problems. Callback conversation with reporter revealed the following information: the reporter has not had this problem before, but he has heard of other pilots in a similar situation. His aircraft was carefully checked in cancun with all available ADF's and both receivers checked out well. The reporter believes that cozumel was overpwring fish hook. The reporter has heard nothing from the FAA on this matter.

Original NASA ASRS Text

Title: TRACK DEV ON AN ADF AIRWAY IN THE CARIBBEAN.

Narrative: WHILE NAVING ON BG46 WE WERE ASKED IF WE WERE GOING DIRECT ROBIN INTXN (INTXN AT UB881 AND B646) AT 194 MI FROM KEY WEST. HAVANA RADAR TOLD US THAT WE WERE 24 MI S OF COURSE. WE WERE USING BOTH ADF'S ON FISH HOOK. BOTH INDICATED WE WERE NAVING ON COURSE. WE WROTE UP NAV SYS BUT NOTHING WAS FOUND. I THINK WE MAY HAVE LOST DIRECTIONAL INFO EVEN THOUGH WE STILL HAD AN IDENT. THERE MAY HAVE BEEN INTERFERENCE FROM COZUMEL 330 KZ (FISH HOOK 332 KZ). WE LANDED IN CANCUN WITH NO OTHER PROBS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR HAS NOT HAD THIS PROB BEFORE, BUT HE HAS HEARD OF OTHER PLTS IN A SIMILAR SIT. HIS ACFT WAS CAREFULLY CHKED IN CANCUN WITH ALL AVAILABLE ADF'S AND BOTH RECEIVERS CHKED OUT WELL. THE RPTR BELIEVES THAT COZUMEL WAS OVERPWRING FISH HOOK. THE RPTR HAS HEARD NOTHING FROM THE FAA ON THIS MATTER.

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.