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Apparent miscom by cpr flight crew of clearance interpretation regarding altitude crossing restr 15 mi west of mtn airport vice mrb VOR.
| Attributes | |
| ACN | 388699 |
| Time | |
| Date | 199712 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : mrb |
| State Reference | WV |
| Altitude | msl bound lower : 20400 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc tower : bur |
| Operator | general aviation : corporate |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 3000 flight time type : 125 |
| ASRS Report | 388699 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 130 flight time total : 12000 flight time type : 1000 |
| ASRS Report | 388213 |
| Events | |
| Anomaly | altitude deviation : crossing restriction not met non adherence : clearance other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 30000 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
The center cleared us direct to martin state airport. The PNF repeated the clearance and programmed the FMS. The next clearance was to cross 15 mi west of martinsburg at 15000 ft. The clearance was repeated back. The PNF programmed the FMS to cross 15 mi of martin state at 15000 ft. About 7-8 mins later I questioned the PNF. Was it to cross martin state or martinsburg at 15000 ft. I had the PNF ask the controller on 133.67 which one it was. At that time we were told martinsburg. We told the controller that we made a mistake and were starting down. We told him (the controller) that we were not going to cross 15 mi west of martin state at 15000 ft. Corrective actions: started down from FL250. Power was at idle and full airbrake. We were descending at 4200 FPM. The center controller gave a heading of 030 degrees and then 360 degrees. Then the controller told us to level at 21000 ft. We were at FL214 and descending at 4200 FPM. The PNF acknowledged the leveloff but told center we would go below FL210. I arrested the descent at FL204 and started a climb back up to FL210. According to our TCASII the plane never was closer than 5 mi 500 ft. Martinsburg and martin state sound alike. Being cleared to martin state then being reclred to mrb was difficult and caused confusion in the cockpit. ATC should have monitored our altitude as a double-check and when we asked he should have given us a new clearance. However there did need to be more crew coordination.
Original NASA ASRS Text
Title: APPARENT MISCOM BY CPR FLC OF CLRNC INTERP REGARDING ALT XING RESTR 15 MI W OF MTN ARPT VICE MRB VOR.
Narrative: THE CTR CLRED US DIRECT TO MARTIN STATE ARPT. THE PNF REPEATED THE CLRNC AND PROGRAMMED THE FMS. THE NEXT CLRNC WAS TO CROSS 15 MI W OF MARTINSBURG AT 15000 FT. THE CLRNC WAS REPEATED BACK. THE PNF PROGRAMMED THE FMS TO CROSS 15 MI OF MARTIN STATE AT 15000 FT. ABOUT 7-8 MINS LATER I QUESTIONED THE PNF. WAS IT TO CROSS MARTIN STATE OR MARTINSBURG AT 15000 FT. I HAD THE PNF ASK THE CTLR ON 133.67 WHICH ONE IT WAS. AT THAT TIME WE WERE TOLD MARTINSBURG. WE TOLD THE CTLR THAT WE MADE A MISTAKE AND WERE STARTING DOWN. WE TOLD HIM (THE CTLR) THAT WE WERE NOT GOING TO CROSS 15 MI W OF MARTIN STATE AT 15000 FT. CORRECTIVE ACTIONS: STARTED DOWN FROM FL250. PWR WAS AT IDLE AND FULL AIRBRAKE. WE WERE DSNDING AT 4200 FPM. THE CTR CTLR GAVE A HDG OF 030 DEGS AND THEN 360 DEGS. THEN THE CTLR TOLD US TO LEVEL AT 21000 FT. WE WERE AT FL214 AND DSNDING AT 4200 FPM. THE PNF ACKNOWLEDGED THE LEVELOFF BUT TOLD CTR WE WOULD GO BELOW FL210. I ARRESTED THE DSCNT AT FL204 AND STARTED A CLB BACK UP TO FL210. ACCORDING TO OUR TCASII THE PLANE NEVER WAS CLOSER THAN 5 MI 500 FT. MARTINSBURG AND MARTIN STATE SOUND ALIKE. BEING CLRED TO MARTIN STATE THEN BEING RECLRED TO MRB WAS DIFFICULT AND CAUSED CONFUSION IN THE COCKPIT. ATC SHOULD HAVE MONITORED OUR ALT AS A DOUBLE-CHK AND WHEN WE ASKED HE SHOULD HAVE GIVEN US A NEW CLRNC. HOWEVER THERE DID NEED TO BE MORE CREW COORD.
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.