<< >> NASA ASRS Report 394480, February 1998

Part 135 cargo pilot climbed above las class B assigned altitude of 4000 ft. Las departure controller allowed the aircraft to remain at 4500 ft until unrestr climb to requested altitude was authority/authorized.

Attributes
ACN	394480
Time
Date	199802
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : vgt
State Reference	NV
Altitude	msl bound lower : 4000 msl bound upper : 4500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : las
Operator	general aviation : corporate
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 135
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	None
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 150 flight time total : 16400 flight time type : 6000
ASRS Report	394480
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	altitude deviation : overshoot non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Departed vgt XA10 through class B. Contacted las approach after departing vgt. Las approach said my radio was unreadable and to change to another radio. I switched to second radio and was cleared through class B at 4000 ft. I used my ADF compass to mark 4000 ft. This is normal procedure and was as expected. I received this clearance before reaching 4000 ft, and I should have leveled off as normal. The radio was a minor problem, but it must have taken my attention away from my altimeter. As I climbed through 4000 ft, las questioned me about my altitude and I started back down from 4500 ft. Las approach said to stay at 4500 ft as there was no traffic and I remained at 4500 ft until later cleared higher.

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Original NASA ASRS Text

Title: PART 135 CARGO PLT CLBED ABOVE LAS CLASS B ASSIGNED ALT OF 4000 FT. LAS DEP CTLR ALLOWED THE ACFT TO REMAIN AT 4500 FT UNTIL UNRESTR CLB TO REQUESTED ALT WAS AUTH.

Narrative: DEPARTED VGT XA10 THROUGH CLASS B. CONTACTED LAS APCH AFTER DEPARTING VGT. LAS APCH SAID MY RADIO WAS UNREADABLE AND TO CHANGE TO ANOTHER RADIO. I SWITCHED TO SECOND RADIO AND WAS CLRED THROUGH CLASS B AT 4000 FT. I USED MY ADF COMPASS TO MARK 4000 FT. THIS IS NORMAL PROC AND WAS AS EXPECTED. I RECEIVED THIS CLRNC BEFORE REACHING 4000 FT, AND I SHOULD HAVE LEVELED OFF AS NORMAL. THE RADIO WAS A MINOR PROB, BUT IT MUST HAVE TAKEN MY ATTN AWAY FROM MY ALTIMETER. AS I CLBED THROUGH 4000 FT, LAS QUESTIONED ME ABOUT MY ALT AND I STARTED BACK DOWN FROM 4500 FT. LAS APCH SAID TO STAY AT 4500 FT AS THERE WAS NO TFC AND I REMAINED AT 4500 FT UNTIL LATER CLRED HIGHER.

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.