A B732 crew descending on STAR into tpa missed a crossing restr.

Attributes
ACN	520645
Time
Date	200108
Day	Mon
Local Time Of Day	1801 To 2400
Place
State Reference	FL
Altitude	msl single value : 11000
Environment
Flight Conditions	Mixed
Weather Elements	Rain Thunderstorm
Light	Night
Aircraft 1
Controlling Facilities	artcc : zjx.artcc
Operator	common carrier : air carrier
Make Model Name	B737-200
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	arrival : profile descent arrival star : lzard.lzard2
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 210 flight time total : 8500 flight time type : 2000
ASRS Report	520645
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : private pilot : atp pilot : commercial pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 210 flight time total : 4000 flight time type : 900
ASRS Report	520780
Events
Anomaly	altitude deviation : crossing restriction not met altitude deviation : overshoot non adherence : published procedure non adherence : clearance other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Chart Or Publication Weather Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
Chart	airport : tpa.airport star : lzard

Narrative:

On the lzard 2 arrival into tpa, we were given multiple step-down dscnts and were trying to deviate around WX with an inconsistent radar. We were finally cleared to cross marvi at 13000 ft and 250 KTS. I had originally idented marvi as ocf 185 degree radial at 53 DME because it had the D53 direct depiction on the arrival chart. Upon further review, I thought it was 23 DME but soon realized that was the segment distance from grasn and marvi. We were then given further descent to 7000 ft. I finally figured out that marvi was idented as the ocf 185 degree radial at 32 DME by subtracting the segment distance (21 DME) from the known DME at lzard (53 DME). Unfortunately, this occurred when we were already past marvi and at approximately 11000 ft. I most likely did not make the crossing restr, but I don't know. The depiction on the arrival route is great for an EFIS aircraft but is confusing for those of us who use VOR/DME. The arrival again is lzard 2 arrival dated jul/fri/01. Recommend that the specific DME for marvi be depicted on the arrival -- not just segment distances.

Original NASA ASRS Text

Title: A B732 CREW DSNDING ON STAR INTO TPA MISSED A XING RESTR.

Narrative: ON THE LZARD 2 ARR INTO TPA, WE WERE GIVEN MULTIPLE STEP-DOWN DSCNTS AND WERE TRYING TO DEVIATE AROUND WX WITH AN INCONSISTENT RADAR. WE WERE FINALLY CLRED TO CROSS MARVI AT 13000 FT AND 250 KTS. I HAD ORIGINALLY IDENTED MARVI AS OCF 185 DEG RADIAL AT 53 DME BECAUSE IT HAD THE D53 DIRECT DEPICTION ON THE ARR CHART. UPON FURTHER REVIEW, I THOUGHT IT WAS 23 DME BUT SOON REALIZED THAT WAS THE SEGMENT DISTANCE FROM GRASN AND MARVI. WE WERE THEN GIVEN FURTHER DSCNT TO 7000 FT. I FINALLY FIGURED OUT THAT MARVI WAS IDENTED AS THE OCF 185 DEG RADIAL AT 32 DME BY SUBTRACTING THE SEGMENT DISTANCE (21 DME) FROM THE KNOWN DME AT LZARD (53 DME). UNFORTUNATELY, THIS OCCURRED WHEN WE WERE ALREADY PAST MARVI AND AT APPROX 11000 FT. I MOST LIKELY DID NOT MAKE THE XING RESTR, BUT I DON'T KNOW. THE DEPICTION ON THE ARR RTE IS GREAT FOR AN EFIS ACFT BUT IS CONFUSING FOR THOSE OF US WHO USE VOR/DME. THE ARR AGAIN IS LZARD 2 ARR DATED JUL/FRI/01. RECOMMEND THAT THE SPECIFIC DME FOR MARVI BE DEPICTED ON THE ARR -- NOT JUST SEGMENT DISTANCES.

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.