Commuter small transport altitude deviation undershot crossing restriction not made.

Attributes
ACN	125029
Time
Date	198910
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : hnk
State Reference	NY
Altitude	msl bound lower : 18000 msl bound upper : 19000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zbw
Operator	common carrier : air carrier
Make Model Name	Small Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 40 flight time total : 15000
ASRS Report	125029
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : developmental
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : undershoot non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : unable none taken : insufficient time none taken : anomaly accepted
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Deviation Pilot Deviation

Narrative:

On oct/fri/89 I was captain, buf-ewr FL230. Approaching hnk VOR 2 mi northwest bos center, cleared me to FL210 read back and started to comply. Immediately, came another clearance to cross 10 mi east of hnk at FL180 and slow to 250 KTS. Advised that it was impossible to make restriction of altitude and airspeed. Bos center said make altitude first, had aircraft descending at 5000 FPM but with 507 KT glide slope it was impossible to be level in 8 mi which is what I had left after last clearance. Things were happening fast and I believe I came close to complying. But in the middle of this maximum effort, a frequency change was issued, to ny center asked them to check back with bos center to see if there was a problem. Only thing I was able to find out is that there was controller training in progress.

Original NASA ASRS Text

Title: COMMUTER SMT ALT DEVIATION UNDERSHOT CROSSING RESTRICTION NOT MADE.

Narrative: ON OCT/FRI/89 I WAS CAPT, BUF-EWR FL230. APCHING HNK VOR 2 MI NW BOS CENTER, CLRED ME TO FL210 READ BACK AND STARTED TO COMPLY. IMMEDIATELY, CAME ANOTHER CLRNC TO CROSS 10 MI E OF HNK AT FL180 AND SLOW TO 250 KTS. ADVISED THAT IT WAS IMPOSSIBLE TO MAKE RESTRICTION OF ALT AND AIRSPEED. BOS CENTER SAID MAKE ALT FIRST, HAD ACFT DESCENDING AT 5000 FPM BUT WITH 507 KT GLIDE SLOPE IT WAS IMPOSSIBLE TO BE LEVEL IN 8 MI WHICH IS WHAT I HAD LEFT AFTER LAST CLRNC. THINGS WERE HAPPENING FAST AND I BELIEVE I CAME CLOSE TO COMPLYING. BUT IN THE MIDDLE OF THIS MAX EFFORT, A FREQ CHANGE WAS ISSUED, TO NY CENTER ASKED THEM TO CHECK BACK WITH BOS CENTER TO SEE IF THERE WAS A PROBLEM. ONLY THING I WAS ABLE TO FIND OUT IS THAT THERE WAS CTLR TRAINING IN PROGRESS.

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.