|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1801 To 2400|
|Locale Reference||atc facility : obi|
|Altitude||msl bound lower : 8000|
msl bound upper : 9000
|Controlling Facilities||artcc : zbw|
|Operator||general aviation : instructional|
|Make Model Name||Small Aircraft, Low Wing, 1 Eng, Fixed Gear|
|Flight Phase||climbout : intermediate altitude|
|Route In Use||enroute : on vectors|
|Function||flight crew : single pilot|
|Qualification||pilot : instrument|
pilot : commercial
pilot : cfi
|Experience||flight time last 90 days : 65|
flight time total : 2000
flight time type : 1800
|Affiliation||government : faa|
|Function||controller : radar|
|Qualification||controller : radar|
|Anomaly||aircraft equipment problem : less severe|
non adherence : far
non adherence : clearance
other anomaly other
|Independent Detector||other controllera|
|Primary Problem||Flight Crew Human Performance|
|Air Traffic Incident||Pilot Deviation|
I was cleared to climb from lower assigned altitude to 9000', the minimum vectoring altitude in the area ahead. Approaching 8000' I experienced some engine roughness, possibly carburetor ice, and in attempting to diagnose and cure this problem, inadvertently leveled at 8000' for a few mins before resuming the climb to 9000'. Having flown early in the morning to have an annual inspection performed and assisted in that work, fatigue was probably a factor, and concern about the aircraft after maintenance. Given the minimum altitude ahead, and the clearance to climb, it is doubtful that any other aircraft were affected. Sufficient visual reference was available to assure in excess of 4000' terrain clearance at 8000'. While this case appears in itself harmless. It does show all too well the hazard of combined fatigue and distraction. Additionally, if the engine problem had been reported to center, they might have provided a warning of any failure to continue climbing.
Original NASA ASRS Text
Title: FAILED TO CONTINUE CLIMB TO MINIMUM RADAR VECTOR ALT.
Narrative: I WAS CLRED TO CLB FROM LOWER ASSIGNED ALT TO 9000', THE MINIMUM VECTORING ALT IN THE AREA AHEAD. APCHING 8000' I EXPERIENCED SOME ENG ROUGHNESS, POSSIBLY CARB ICE, AND IN ATTEMPTING TO DIAGNOSE AND CURE THIS PROB, INADVERTENTLY LEVELED AT 8000' FOR A FEW MINS BEFORE RESUMING THE CLB TO 9000'. HAVING FLOWN EARLY IN THE MORNING TO HAVE AN ANNUAL INSPECTION PERFORMED AND ASSISTED IN THAT WORK, FATIGUE WAS PROBABLY A FACTOR, AND CONCERN ABOUT THE ACFT AFTER MAINT. GIVEN THE MINIMUM ALT AHEAD, AND THE CLRNC TO CLB, IT IS DOUBTFUL THAT ANY OTHER ACFT WERE AFFECTED. SUFFICIENT VISUAL REF WAS AVAILABLE TO ASSURE IN EXCESS OF 4000' TERRAIN CLRNC AT 8000'. WHILE THIS CASE APPEARS IN ITSELF HARMLESS. IT DOES SHOW ALL TOO WELL THE HAZARD OF COMBINED FATIGUE AND DISTR. ADDITIONALLY, IF THE ENG PROB HAD BEEN RPTED TO CENTER, THEY MIGHT HAVE PROVIDED A WARNING OF ANY FAILURE TO CONTINUE CLBING.
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.