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Cpr jet on an engine flight test, believing they had an altitude block clearance, leaves their assigned altitude of FL370 for FL220 for engine restart without clearance from controller at ZFW, tx.
| Attributes | |
| ACN | 620741 |
| Time | |
| Date | 200406 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zfw.artcc |
| State Reference | TX |
| Altitude | msl bound lower : 22000 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Phase | cruise : level cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 11000 flight time type : 1000 |
| ASRS Report | 620741 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : overcame equipment problem |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Airspace Structure Aircraft ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Advised center of test requiring protected airspace FL310, FL350, FL370 to 15000 ft MSL. Cleared to conduct test at FL310, completed test, requested FL350. At FL350, cleared for test, completed. Requested FL370, verified routing and clear to test. Engine stalled and commenced descent. Did not declare emergency as understood cleared for test FL370 to 15000 ft (well within relight envelope). Relight completed at FL220 and returned to base. Asked to contact center. Some misunderstanding of clearance for test between aircraft and center. Remedy: with each controller, verify understanding of test to be performed and parameters of testing.
Original NASA ASRS Text
Title: CPR JET ON AN ENG FLT TEST, BELIEVING THEY HAD AN ALT BLOCK CLRNC, LEAVES THEIR ASSIGNED ALT OF FL370 FOR FL220 FOR ENG RESTART WITHOUT CLRNC FROM CTLR AT ZFW, TX.
Narrative: ADVISED CTR OF TEST REQUIRING PROTECTED AIRSPACE FL310, FL350, FL370 TO 15000 FT MSL. CLRED TO CONDUCT TEST AT FL310, COMPLETED TEST, REQUESTED FL350. AT FL350, CLRED FOR TEST, COMPLETED. REQUESTED FL370, VERIFIED ROUTING AND CLR TO TEST. ENG STALLED AND COMMENCED DSCNT. DID NOT DECLARE EMER AS UNDERSTOOD CLRED FOR TEST FL370 TO 15000 FT (WELL WITHIN RELIGHT ENVELOPE). RELIGHT COMPLETED AT FL220 AND RETURNED TO BASE. ASKED TO CONTACT CTR. SOME MISUNDERSTANDING OF CLRNC FOR TEST BTWN ACFT AND CTR. REMEDY: WITH EACH CTLR, VERIFY UNDERSTANDING OF TEST TO BE PERFORMED AND PARAMETERS OF TESTING.
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.