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Vacuum pump of small aircraft aircraft allegedly failed inside the OM on approach to sba. Tower had requested keep speed up to 140 mph.
| Attributes | |
| ACN | 188167 |
| Time | |
| Date | 199109 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sba |
| State Reference | CA |
| Altitude | agl bound lower : 0 agl bound upper : 500 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tower : sba |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Fixed Gear |
| Flight Phase | descent : approach descent other landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : instrument pilot : private |
| Experience | flight time last 90 days : 35 flight time total : 2300 flight time type : 1400 |
| ASRS Report | 188167 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other other : unspecified cockpit |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Vacuum pump failed in IMC inside OM causing destabilized approach. Recommendation: develop situation indicator and gyro heading indicator instruments with flags that pop up right on the face of the instrument upon lost instrument vacuum or pressure. Non- contributing factor but comment: controller asked me to 'maintain current airspeed' which was 140 KTS after I was 2 mi inside initial approach fix. This is very difficult to do for someone used to flying approachs at 100 KTS, increases workload to an unacceptable level when you have to slow the plane down, lower gear and flaps, and stay stablized all in the last 60 seconds of the approach and what do you save? Maybe 1 min of delay for the following airliner. I feel these requests, which happen quite often, create an unsafe condition especially when landing at or near mins.
Original NASA ASRS Text
Title: VACUUM PUMP OF SMA ACFT ALLEGEDLY FAILED INSIDE THE OM ON APCH TO SBA. TWR HAD REQUESTED KEEP SPD UP TO 140 MPH.
Narrative: VACUUM PUMP FAILED IN IMC INSIDE OM CAUSING DESTABILIZED APCH. RECOMMENDATION: DEVELOP SITUATION INDICATOR AND GYRO HDG INDICATOR INSTS WITH FLAGS THAT POP UP R ON THE FACE OF THE INST UPON LOST INST VACUUM OR PRESSURE. NON- CONTRIBUTING FACTOR BUT COMMENT: CTLR ASKED ME TO 'MAINTAIN CURRENT AIRSPD' WHICH WAS 140 KTS AFTER I WAS 2 MI INSIDE INITIAL APCH FIX. THIS IS VERY DIFFICULT TO DO FOR SOMEONE USED TO FLYING APCHS AT 100 KTS, INCREASES WORKLOAD TO AN UNACCEPTABLE LEVEL WHEN YOU HAVE TO SLOW THE PLANE DOWN, LOWER GEAR AND FLAPS, AND STAY STABLIZED ALL IN THE LAST 60 SECONDS OF THE APCH AND WHAT DO YOU SAVE? MAYBE 1 MIN OF DELAY FOR THE FOLLOWING AIRLINER. I FEEL THESE REQUESTS, WHICH HAPPEN QUITE OFTEN, CREATE AN UNSAFE CONDITION ESPECIALLY WHEN LNDG AT OR NEAR MINS.
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.