A EMB135 flight crew inadvertently delete a waypoint from their FMS resulting in becoming off course with a possible penetration of restr airspace. It was not detected until vsp approach advised the flight crew.

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Attributes
ACN	594521
Time
Date	200309
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : cew.vortac
State Reference	FL
Altitude	msl single value : 15000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	EMB ERJ 135 ER&LR
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Experience	flight time last 90 days : 250 flight time total : 2500 flight time type : 600
ASRS Report	594521
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp pilot : multi engine
Experience	flight time last 90 days : 85 flight time total : 6500 flight time type : 1000
ASRS Report	594520
Events
Anomaly	airspace violation : entry non adherence : clearance non adherence : far other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued advisory flight crew : returned to intended or assigned course flight crew : exited penetrated airspace
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

While en route from mco to pns, we were given the following clearance. Cew direct pensi direct pns. A short while later, we were given our expected approach into pns (NDB35). In the process of entering the approach into the FMS, the intersection pensi was accidentally deleted. Neither myself nor my captain noticed. Because of this error, after cew the aircraft turned towards its next fix (ie, pns). We were immediately alerted to our error by the understandably agitated controller. We were informed we 'may have entered restr airspace' or something to that effect. (I am still unsure if we entered the restr airspace or not.) once we were alerted to our mistake, we were immediately turned on a northerly heading to get us back on course. We were back on course shortly thereafter. Lack of attentiveness by both pilots towards reprogramming the FMS was a significant factor also. Had we been notified there was an active MOA, both myself and my captain would have been on the highest alert.

Original NASA ASRS Text

Title: A EMB135 FLT CREW INADVERTENTLY DELETE A WAYPOINT FROM THEIR FMS RESULTING IN BECOMING OFF COURSE WITH A POSSIBLE PENETRATION OF RESTR AIRSPACE. IT WAS NOT DETECTED UNTIL VSP APCH ADVISED THE FLT CREW.

Narrative: WHILE ENRTE FROM MCO TO PNS, WE WERE GIVEN THE FOLLOWING CLRNC. CEW DIRECT PENSI DIRECT PNS. A SHORT WHILE LATER, WE WERE GIVEN OUR EXPECTED APCH INTO PNS (NDB35). IN THE PROCESS OF ENTERING THE APCH INTO THE FMS, THE INTXN PENSI WAS ACCIDENTALLY DELETED. NEITHER MYSELF NOR MY CAPT NOTICED. BECAUSE OF THIS ERROR, AFTER CEW THE ACFT TURNED TOWARDS ITS NEXT FIX (IE, PNS). WE WERE IMMEDIATELY ALERTED TO OUR ERROR BY THE UNDERSTANDABLY AGITATED CTLR. WE WERE INFORMED WE 'MAY HAVE ENTERED RESTR AIRSPACE' OR SOMETHING TO THAT EFFECT. (I AM STILL UNSURE IF WE ENTERED THE RESTR AIRSPACE OR NOT.) ONCE WE WERE ALERTED TO OUR MISTAKE, WE WERE IMMEDIATELY TURNED ON A NORTHERLY HDG TO GET US BACK ON COURSE. WE WERE BACK ON COURSE SHORTLY THEREAFTER. LACK OF ATTENTIVENESS BY BOTH PLTS TOWARDS REPROGRAMMING THE FMS WAS A SIGNIFICANT FACTOR ALSO. HAD WE BEEN NOTIFIED THERE WAS AN ACTIVE MOA, BOTH MYSELF AND MY CAPT WOULD HAVE BEEN ON THE HIGHEST ALERT.

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.