A cpr HS25 flight crew climbed above their assigned altitude on departure.

Attributes
ACN	392160
Time
Date	199801
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : apf
State Reference	FL
Altitude	msl bound lower : 2000 msl bound upper : 2800
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : rsw
Operator	general aviation : corporate
Make Model Name	HS 125 Series 700
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 70 flight time total : 2831 flight time type : 328
ASRS Report	392160
Person 2
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : far
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After takeoff from apf, clearance was climb to 2000 ft. After leveling off at 2000 ft, PF thought he heard climb and maintain 4000 ft. Note: PNF did not hear this clearance. We left 2000 ft for 4000 ft and at 2800 ft the PNF discovered the altitude deviation. Corrective action was taken and we descended back down to 2000 ft. We were then cleared to 4000 ft. Contributing factors were heavy rain and turbulence, misunderstanding by crew.

Original NASA ASRS Text

Title: A CPR HS25 FLC CLBED ABOVE THEIR ASSIGNED ALT ON DEP.

Narrative: AFTER TKOF FROM APF, CLRNC WAS CLB TO 2000 FT. AFTER LEVELING OFF AT 2000 FT, PF THOUGHT HE HEARD CLB AND MAINTAIN 4000 FT. NOTE: PNF DID NOT HEAR THIS CLRNC. WE LEFT 2000 FT FOR 4000 FT AND AT 2800 FT THE PNF DISCOVERED THE ALTDEV. CORRECTIVE ACTION WAS TAKEN AND WE DSNDED BACK DOWN TO 2000 FT. WE WERE THEN CLRED TO 4000 FT. CONTRIBUTING FACTORS WERE HVY RAIN AND TURB, MISUNDERSTANDING BY CREW.

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.