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Pilot of light twin engine aircraft exceeds permissible time-altitude restrictions of federal aviation regulations.
| Attributes | |
| ACN | 121373 |
| Time | |
| Date | 198908 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zdv |
| State Reference | CO |
| Altitude | msl bound lower : 12500 msl bound upper : 15000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv |
| Operator | general aviation : personal |
| Make Model Name | Small Transport, Low Wing, 2 Recip Eng |
| Flight Phase | cruise other |
| Route In Use | enroute airway : zdv |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : private pilot : instrument |
| Experience | flight time last 90 days : 30 flight time total : 2500 flight time type : 400 |
| ASRS Report | 121373 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During en route phase of IFR flight, cumulus buildups were encountered which could not be topped or circumnaved. Pilot requested higher altitudes and succeeded in avoiding buildups. Duration of flight above 12,500 probably exceeded 30 mins. No supplemental oxygen available and no pressurization of cabin. Pilot was not aware that far 91.32 prohibited such altitude until later. Continual and frequent review of far would reinforce details of regulations that may be forgotten.
Original NASA ASRS Text
Title: PLT OF LIGHT TWIN ENGINE ACFT EXCEEDS PERMISSIBLE TIME-ALT RESTRICTIONS OF FEDERAL AVIATION REGS.
Narrative: DURING ENRTE PHASE OF IFR FLT, CUMULUS BUILDUPS WERE ENCOUNTERED WHICH COULD NOT BE TOPPED OR CIRCUMNAVED. PLT REQUESTED HIGHER ALTS AND SUCCEEDED IN AVOIDING BUILDUPS. DURATION OF FLT ABOVE 12,500 PROBABLY EXCEEDED 30 MINS. NO SUPPLEMENTAL OXYGEN AVAILABLE AND NO PRESSURIZATION OF CABIN. PLT WAS NOT AWARE THAT FAR 91.32 PROHIBITED SUCH ALT UNTIL LATER. CONTINUAL AND FREQUENT REVIEW OF FAR WOULD REINFORCE DETAILS OF REGS THAT MAY BE FORGOTTEN.
Data retrieved from NASA's ASRS site as of August 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.