Crossing restr not met during arrival at honolulu, hi.

Attributes
ACN	484290
Time
Date	200009
Day	Wed
Local Time Of Day	1801 To 2400
Place
State Reference	HI
Altitude	msl bound lower : 4000 msl bound upper : 4800
Environment
Flight Conditions	IMC
Weather Elements	Turbulence
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	PA-60 600 Aerostar
Operating Under FAR Part	Part 91
Flight Phase	cruise : enroute altitude change
Route In Use	enroute airway : v8.airway
Flight Plan	IFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Experience	flight time last 90 days : 40 flight time total : 1600 flight time type : 228
ASRS Report	484290
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	altitude deviation : undershoot altitude deviation : crossing restriction not met inflight encounter : weather inflight encounter : turbulence non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Flight Crew Human Performance Weather Environmental Factor
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was returning to honolulu on an IFR flight plan, about 5 mi east of the molokai VOR on V-8 at 8000 ft. I received the following instructions from center: 'aircraft X descend to 6000 ft plan to cross loki intersection at 4000 ft.' I began a 1000 FPM descent and reduced power. I entered some cumulus build-ups at this point and was experiencing light to moderate turbulence. I slowed my descent rate to 500 FPM to slow airspeed. Crossed molokai VOR at 6500 ft still planning to cross loki intersection at 4000 ft. There was a 20 KT tailwind, my ground speed about 230 KTS. Well, things didn't work out like I had planned and I crossed loki intersection at 4800 ft. Thinking back on this situation, I've flown this same route and same descent profile at least 20 times correctly. Why did things go wrong today, and what could I have done differently? It is clear to me now that as soon as I encountered turbulence I should have notified ATC of my situation. I could have gotten an amended clearance, but I chose to push on thinking I could make things work out. Next time I find myself in this situation I will speak up.

Original NASA ASRS Text

Title: XING RESTR NOT MET DURING ARRIVAL AT HONOLULU, HI.

Narrative: I WAS RETURNING TO HONOLULU ON AN IFR FLT PLAN, ABOUT 5 MI E OF THE MOLOKAI VOR ON V-8 AT 8000 FT. I RECEIVED THE FOLLOWING INSTRUCTIONS FROM CTR: 'ACFT X DSND TO 6000 FT PLAN TO CROSS LOKI INTXN AT 4000 FT.' I BEGAN A 1000 FPM DSCNT AND REDUCED PWR. I ENTERED SOME CUMULUS BUILD-UPS AT THIS POINT AND WAS EXPERIENCING LIGHT TO MODERATE TURB. I SLOWED MY DSCNT RATE TO 500 FPM TO SLOW AIRSPD. CROSSED MOLOKAI VOR AT 6500 FT STILL PLANNING TO CROSS LOKI INTXN AT 4000 FT. THERE WAS A 20 KT TAILWIND, MY GND SPD ABOUT 230 KTS. WELL, THINGS DIDN'T WORK OUT LIKE I HAD PLANNED AND I CROSSED LOKI INTXN AT 4800 FT. THINKING BACK ON THIS SIT, I'VE FLOWN THIS SAME RTE AND SAME DSCNT PROFILE AT LEAST 20 TIMES CORRECTLY. WHY DID THINGS GO WRONG TODAY, AND WHAT COULD I HAVE DONE DIFFERENTLY? IT IS CLR TO ME NOW THAT AS SOON AS I ENCOUNTERED TURB I SHOULD HAVE NOTIFIED ATC OF MY SIT. I COULD HAVE GOTTEN AN AMENDED CLRNC, BUT I CHOSE TO PUSH ON THINKING I COULD MAKE THINGS WORK OUT. NEXT TIME I FIND MYSELF IN THIS SIT I WILL SPEAK UP.

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.