D328 flight crew programs FMC incorrectly and misses their crossing restr on descent into lga.

Attributes
ACN	517420
Time
Date	200107
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : vibes
State Reference	PA
Altitude	msl single value : 15500
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Do 328 TP (Turboprop)
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : atp pilot : cfi pilot : instrument
Experience	flight time last 90 days : 225 flight time total : 1825 flight time type : 250
ASRS Report	517420
Events
Anomaly	altitude deviation : crossing restriction not met non adherence : clearance
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was the PNF en route from day to lga. My first officer was flying and temporarily handling communication #1 (with ATC) while I was on communication #2 talking with company. ATC issued a late descent crossing restr to cross 'vibes' intersection at 13000 ft. When I returned to communication #1, my first officer briefed on the crossing restr and advised me that he had programmed the FMS with the autoplt coupled for the crossing. I realized that the top of descent displayed on the mfd by the FMS was incorrectly plotted for our altitude. I immediately advised my first officer to initiate a descent and I informed ATC that we would be unable to cross vibes intersection at 13000 ft. We crossed vibes intersection at approximately 15500 ft.

Original NASA ASRS Text

Title: D328 FLT CREW PROGRAMS FMC INCORRECTLY AND MISSES THEIR XING RESTR ON DSCNT INTO LGA.

Narrative: I WAS THE PNF ENRTE FROM DAY TO LGA. MY FO WAS FLYING AND TEMPORARILY HANDLING COM #1 (WITH ATC) WHILE I WAS ON COM #2 TALKING WITH COMPANY. ATC ISSUED A LATE DSCNT XING RESTR TO CROSS 'VIBES' INTXN AT 13000 FT. WHEN I RETURNED TO COM #1, MY FO BRIEFED ON THE XING RESTR AND ADVISED ME THAT HE HAD PROGRAMMED THE FMS WITH THE AUTOPLT COUPLED FOR THE XING. I REALIZED THAT THE TOP OF DSCNT DISPLAYED ON THE MFD BY THE FMS WAS INCORRECTLY PLOTTED FOR OUR ALT. I IMMEDIATELY ADVISED MY FO TO INITIATE A DSCNT AND I INFORMED ATC THAT WE WOULD BE UNABLE TO CROSS VIBES INTXN AT 13000 FT. WE CROSSED VIBES INTXN AT APPROX 15500 FT.

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.