Flight plan filed other than the one received from ATC. Heading track position deviation in clearance interpretation incident. Aircraft equipment problem with air carrier's, no pre departure clearance procedures available.

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Attributes
ACN	252390
Time
Date	199309
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : phl
State Reference	PA
Altitude	agl bound lower : 0 agl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny tower : stl
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : takeoff cruise other ground : preflight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : instrument pilot : atp
Experience	flight time last 90 days : 150 flight time total : 15000 flight time type : 285
ASRS Report	252390
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe non adherence : published procedure other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance 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:

The first officer tried unsuccessfully several times to get our clearance from phl to sfo via the ACARS system. We were both seated in the cockpit at the time. I was discussing another problem with the 'a' flight attendant and a mechanic. The first officer then received our clearance from phl clearance delivery via the VHF radio. After he got the clearance he stated that the routing was 'as filed' on our flight plan. In fact the routing had been changed. Originally we had requested an initial routing from phl direct to mxe then via mxe 278 to pensy J48 EMI V166 ruane direct mrb J6. The clearance as given was direct mxe, then the mxe 278 radial to J6. Although these routings seem very similar there is in fact a large bi-passing of the pensy EMI ruane area. Once airborne and handed over to ZNY we were told to fly direct to 'flirt.' the first officer was flying this leg and I was doing the radio work. I told the center that 'flirt' wasn't on our route. We were given a frequency change and the next controller gave us a heading to fly. I asked for direct mrb. He said unable. I asked the first officer again how we were cleared. He pulled out his copy of the clearance. We both realized that the routing had been subtly changed. I immediately informed center and we were cleared to intercept J6. We were VFR and no conflict was involved.

Original NASA ASRS Text

Title: FLT PLAN FILED OTHER THAN THE ONE RECEIVED FROM ATC. HDG TRACK POS DEV IN CLRNC INTERP INCIDENT. ACFT EQUIP PROB WITH ACR'S, NO PDC PROCS AVAILABLE.

Narrative: THE FO TRIED UNSUCCESSFULLY SEVERAL TIMES TO GET OUR CLRNC FROM PHL TO SFO VIA THE ACARS SYS. WE WERE BOTH SEATED IN THE COCKPIT AT THE TIME. I WAS DISCUSSING ANOTHER PROB WITH THE 'A' FLT ATTENDANT AND A MECH. THE FO THEN RECEIVED OUR CLRNC FROM PHL CLRNC DELIVERY VIA THE VHF RADIO. AFTER HE GOT THE CLRNC HE STATED THAT THE ROUTING WAS 'AS FILED' ON OUR FLT PLAN. IN FACT THE ROUTING HAD BEEN CHANGED. ORIGINALLY WE HAD REQUESTED AN INITIAL ROUTING FROM PHL DIRECT TO MXE THEN VIA MXE 278 TO PENSY J48 EMI V166 RUANE DIRECT MRB J6. THE CLRNC AS GIVEN WAS DIRECT MXE, THEN THE MXE 278 RADIAL TO J6. ALTHOUGH THESE ROUTINGS SEEM VERY SIMILAR THERE IS IN FACT A LARGE BI-PASSING OF THE PENSY EMI RUANE AREA. ONCE AIRBORNE AND HANDED OVER TO ZNY WE WERE TOLD TO FLY DIRECT TO 'FLIRT.' THE FO WAS FLYING THIS LEG AND I WAS DOING THE RADIO WORK. I TOLD THE CTR THAT 'FLIRT' WASN'T ON OUR RTE. WE WERE GIVEN A FREQ CHANGE AND THE NEXT CTLR GAVE US A HDG TO FLY. I ASKED FOR DIRECT MRB. HE SAID UNABLE. I ASKED THE FO AGAIN HOW WE WERE CLRED. HE PULLED OUT HIS COPY OF THE CLRNC. WE BOTH REALIZED THAT THE ROUTING HAD BEEN SUBTLY CHANGED. I IMMEDIATELY INFORMED CTR AND WE WERE CLRED TO INTERCEPT J6. WE WERE VFR AND NO CONFLICT WAS INVOLVED.

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.