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A cpr G2 flight crew taxied into a merlin when they forgot to turn on the hydraulic pump that supplies pressure to operate the brakes and steering.
| Attributes | |
| ACN | 396849 |
| Time | |
| Date | 199803 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sus |
| State Reference | MO |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Operator | general aviation : corporate |
| Make Model Name | Gulfstream II |
| Operating Under FAR Part | Part 91 |
| Flight Phase | ground other : taxi |
| Flight Plan | None |
| Aircraft 2 | |
| Make Model Name | Merlin Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Flight Phase | ground : parked |
| Flight Plan | None |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 185 flight time total : 9000 flight time type : 400 |
| ASRS Report | 396849 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical conflict : ground critical non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
At approximately XA30 hours on mar/wed/98, I was captain of a gulfstream G2. As I began my taxi to reposition the aircraft from one FBO to another at the sus airport after completing a flight I experienced inability to direct the aircraft with the nosewheel steering. I had received several information letters from gulfstream and had read several accounts of nosewheel steering problems in industry pubs over the last few weeks. As I struggled to control the direction of the aircraft's progress I realized that I had no braking available. Before I could remedy the situation the aircraft came in contact with a parked merlin. The hydraulic pump that initiates braking and steering is controled by a switch that is normally turned on after starting the left engine. As I was taxiing with only the right engine operating, the action of turning this pump on was omitted and therefore left me without brakes or steering. My overly focused attention to the nosewheel steering events left me no time to rectify the brake problem to preclude contact with the merlin. I am fully aware and knowledgeable of how this system operates and can only cite the combination of a change from normal daily routine procedures and a mindset not directed toward flight as the cause for my oversight of failing to activate the system before leaving the chocks.
Original NASA ASRS Text
Title: A CPR G2 FLC TAXIED INTO A MERLIN WHEN THEY FORGOT TO TURN ON THE HYD PUMP THAT SUPPLIES PRESSURE TO OPERATE THE BRAKES AND STEERING.
Narrative: AT APPROX XA30 HRS ON MAR/WED/98, I WAS CAPT OF A GULFSTREAM G2. AS I BEGAN MY TAXI TO REPOSITION THE ACFT FROM ONE FBO TO ANOTHER AT THE SUS ARPT AFTER COMPLETING A FLT I EXPERIENCED INABILITY TO DIRECT THE ACFT WITH THE NOSEWHEEL STEERING. I HAD RECEIVED SEVERAL INFO LETTERS FROM GULFSTREAM AND HAD READ SEVERAL ACCOUNTS OF NOSEWHEEL STEERING PROBS IN INDUSTRY PUBS OVER THE LAST FEW WKS. AS I STRUGGLED TO CTL THE DIRECTION OF THE ACFT'S PROGRESS I REALIZED THAT I HAD NO BRAKING AVAILABLE. BEFORE I COULD REMEDY THE SIT THE ACFT CAME IN CONTACT WITH A PARKED MERLIN. THE HYD PUMP THAT INITIATES BRAKING AND STEERING IS CTLED BY A SWITCH THAT IS NORMALLY TURNED ON AFTER STARTING THE L ENG. AS I WAS TAXIING WITH ONLY THE R ENG OPERATING, THE ACTION OF TURNING THIS PUMP ON WAS OMITTED AND THEREFORE LEFT ME WITHOUT BRAKES OR STEERING. MY OVERLY FOCUSED ATTN TO THE NOSEWHEEL STEERING EVENTS LEFT ME NO TIME TO RECTIFY THE BRAKE PROB TO PRECLUDE CONTACT WITH THE MERLIN. I AM FULLY AWARE AND KNOWLEDGEABLE OF HOW THIS SYS OPERATES AND CAN ONLY CITE THE COMBINATION OF A CHANGE FROM NORMAL DAILY ROUTINE PROCS AND A MINDSET NOT DIRECTED TOWARD FLT AS THE CAUSE FOR MY OVERSIGHT OF FAILING TO ACTIVATE THE SYS BEFORE LEAVING THE CHOCKS.
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.