Heading track position deviation during VOR radial intercept maneuver.

Attributes
ACN	295766
Time
Date	199502
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : pwa
State Reference	OK
Altitude	msl bound lower : 19000 msl bound upper : 19000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zfw
Operator	general aviation : corporate
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 135
Flight Phase	climbout : intermediate altitude cruise other
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial
Experience	flight time last 90 days : 35 flight time total : 8000 flight time type : 100
ASRS Report	295766
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	non adherence : clearance non adherence other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : became reoriented flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We departed the wiley post airport (pwa), okc en route to ft worth, tx. Our clearance was track the irw 167 degree radial outbound to intercept the adm 321 degree radial adm. After tracking the 167 degree radial for a time long enough to have intercepted the adm 321 degree radial I discovered the wrong frequency had been entered into the receiver. The adm frequency is 116.7. The bridgeport VOR frequency (bpr), which is only 66 mi from adm is 116.5. The problem was in the fact that that station was close enough and strong enough to receive at that altitude which made it look good with no flags and the proper to-from indication. Our aircraft has the king FLIP flop selectors (KX165) and make it even more easily confused 116.7 was on one side - standby and 116.5 was on the other, in use - side. Both on the #2 navigation receiver. The reason for that was the fact that bpr 116.5 was the next VOR in our clearance. The controller made us aware that we had overshot our inbound radial and cleared us direct to our destination. We have set up a double-checking procedure to cover the misuse of the FLIP flop feature of these receivers especially when the frequencys are so close together. We believe the best way to protect ourselves with this is a checklist entry in the takeoff-climb-cruise, approach to landing warning off possible wrong frequency in the 'in use' side of the receiver.

Original NASA ASRS Text

Title: HDG TRACK POS DEV DURING VOR RADIAL INTERCEPT MANEUVER.

Narrative: WE DEPARTED THE WILEY POST ARPT (PWA), OKC ENRTE TO FT WORTH, TX. OUR CLRNC WAS TRACK THE IRW 167 DEG RADIAL OUTBOUND TO INTERCEPT THE ADM 321 DEG RADIAL ADM. AFTER TRACKING THE 167 DEG RADIAL FOR A TIME LONG ENOUGH TO HAVE INTERCEPTED THE ADM 321 DEG RADIAL I DISCOVERED THE WRONG FREQ HAD BEEN ENTERED INTO THE RECEIVER. THE ADM FREQ IS 116.7. THE BRIDGEPORT VOR FREQ (BPR), WHICH IS ONLY 66 MI FROM ADM IS 116.5. THE PROB WAS IN THE FACT THAT THAT STATION WAS CLOSE ENOUGH AND STRONG ENOUGH TO RECEIVE AT THAT ALT WHICH MADE IT LOOK GOOD WITH NO FLAGS AND THE PROPER TO-FROM INDICATION. OUR ACFT HAS THE KING FLIP FLOP SELECTORS (KX165) AND MAKE IT EVEN MORE EASILY CONFUSED 116.7 WAS ON ONE SIDE - STANDBY AND 116.5 WAS ON THE OTHER, IN USE - SIDE. BOTH ON THE #2 NAV RECEIVER. THE REASON FOR THAT WAS THE FACT THAT BPR 116.5 WAS THE NEXT VOR IN OUR CLRNC. THE CTLR MADE US AWARE THAT WE HAD OVERSHOT OUR INBOUND RADIAL AND CLRED US DIRECT TO OUR DEST. WE HAVE SET UP A DOUBLE-CHKING PROC TO COVER THE MISUSE OF THE FLIP FLOP FEATURE OF THESE RECEIVERS ESPECIALLY WHEN THE FREQS ARE SO CLOSE TOGETHER. WE BELIEVE THE BEST WAY TO PROTECT OURSELVES WITH THIS IS A CHKLIST ENTRY IN THE TKOF-CLB-CRUISE, APCH TO LNDG WARNING OFF POSSIBLE WRONG FREQ IN THE 'IN USE' SIDE OF THE RECEIVER.

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.