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A C172R pilot was grounded for not reporting the airspeed indicator remains at zero until 40 KTS then jumps to 40 KTS and indicates normal.
| Attributes | |
| ACN | 627386 |
| Time | |
| Date | 200408 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | ground : parked |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | other |
| Function | flight crew : single pilot |
| Qualification | pilot : private |
| Experience | flight time last 90 days : 12 flight time total : 250 flight time type : 75 |
| ASRS Report | 627386 |
| Person 2 | |
| Affiliation | other |
| Function | other personnel other |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | other Other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Flight Crew Human Performance |
Narrative:
During preflight noted aircraft squawk listed following item: 'airspeed indicator stays pegged at '0,' on takeoff roll till 40 KIAS, then it jumps to 40 KIAS and seems to work ok after that.' I did not believe that this squawk was valid and felt that it described the way that I have seen other airspeed indicators work. I did not see the airspeed indicator as inoperative. The squawk sheet did not indicate that the airspeed indicator was inoperative. It was not labeled as such and the aircraft was not listed on the tote board as down, nor did the dispatcher note the aircraft was down. Upon learning of the events, the club senior flight instructor administratively grounded me until retraining was completed. The club also retrained the dispatchers and issued a new pif (pilot information file) for squawk sheet procedures. What I still do not understand, and cannot find any reference to in the far, is guidance that states that any squawk (regardless of the pilot's interpretation of its validity) for a piece of equipment required by 91.205 downs the aircraft.
Original NASA ASRS Text
Title: A C172R PLT WAS GNDED FOR NOT RPTING THE AIRSPD INDICATOR REMAINS AT ZERO UNTIL 40 KTS THEN JUMPS TO 40 KTS AND INDICATES NORMAL.
Narrative: DURING PREFLT NOTED ACFT SQUAWK LISTED FOLLOWING ITEM: 'AIRSPD INDICATOR STAYS PEGGED AT '0,' ON TKOF ROLL TILL 40 KIAS, THEN IT JUMPS TO 40 KIAS AND SEEMS TO WORK OK AFTER THAT.' I DID NOT BELIEVE THAT THIS SQUAWK WAS VALID AND FELT THAT IT DESCRIBED THE WAY THAT I HAVE SEEN OTHER AIRSPD INDICATORS WORK. I DID NOT SEE THE AIRSPD INDICATOR AS INOP. THE SQUAWK SHEET DID NOT INDICATE THAT THE AIRSPD INDICATOR WAS INOP. IT WAS NOT LABELED AS SUCH AND THE ACFT WAS NOT LISTED ON THE TOTE BOARD AS DOWN, NOR DID THE DISPATCHER NOTE THE ACFT WAS DOWN. UPON LEARNING OF THE EVENTS, THE CLUB SENIOR FLT INSTRUCTOR ADMINISTRATIVELY GNDED ME UNTIL RETRAINING WAS COMPLETED. THE CLUB ALSO RETRAINED THE DISPATCHERS AND ISSUED A NEW PIF (PLT INFO FILE) FOR SQUAWK SHEET PROCS. WHAT I STILL DO NOT UNDERSTAND, AND CANNOT FIND ANY REF TO IN THE FAR, IS GUIDANCE THAT STATES THAT ANY SQUAWK (REGARDLESS OF THE PLT'S INTERP OF ITS VALIDITY) FOR A PIECE OF EQUIP REQUIRED BY 91.205 DOWNS THE ACFT.
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.