EMB145 first officer fails to make crossing restriction due to incorrect FMC entry and failure to ha...

Attributes
ACN	808253
Time
Date	200810
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : oxi.vor
State Reference	IN
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zau.artcc
Operator	common carrier : air carrier
Make Model Name	Embraer Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : vacating altitude
Route In Use	arrival star : knox 4
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
ASRS Report	808253
Events
Anomaly	altitude deviation : crossing restriction not met non adherence : clearance
Independent Detector	other controllera
Resolutory Action	none taken : insufficient time
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

ATC issues instructions to cross 45E of oxi at FL250. As PF; I input the information into the FMS; and the captain crosschecked and agreed with my input. A few moments later I asked the captain if the controller had also given us the instruction to cross at 250 KTS; and he confirmed that he did not. Originally I had added a 5 mi buffer (crossing 50E of oxi at FL250) to slow to 250; but since that was incorrect; I re-input the information into the FMS. I made an error the second time of putting a crossing at oxi of FL250. I do not believe the captain (PNF) was aware that I had re-input the information into the FMS. ATC asked us what our original instruction was; and at that time we realized we weren't going to be able to make the assigned crossing. ATC issued an expedited descent to FL250. The captain who had originally crosschecked my information was not aware that I had re-input the information; and therefore was not able to catch my mistake. Improved communication between pilots during FMS input. I believe it was my complacency that caused me not to alert the captain to my changed input.

Original NASA ASRS Text

Title: EMB145 FO FAILS TO MAKE CROSSING RESTRICTION DUE TO INCORRECT FMC ENTRY AND FAILURE TO HAVE NFP CHECK IT.

Narrative: ATC ISSUES INSTRUCTIONS TO CROSS 45E OF OXI AT FL250. AS PF; I INPUT THE INFO INTO THE FMS; AND THE CAPT XCHKED AND AGREED WITH MY INPUT. A FEW MOMENTS LATER I ASKED THE CAPT IF THE CTLR HAD ALSO GIVEN US THE INSTRUCTION TO CROSS AT 250 KTS; AND HE CONFIRMED THAT HE DID NOT. ORIGINALLY I HAD ADDED A 5 MI BUFFER (XING 50E OF OXI AT FL250) TO SLOW TO 250; BUT SINCE THAT WAS INCORRECT; I RE-INPUT THE INFO INTO THE FMS. I MADE AN ERROR THE SECOND TIME OF PUTTING A XING AT OXI OF FL250. I DO NOT BELIEVE THE CAPT (PNF) WAS AWARE THAT I HAD RE-INPUT THE INFO INTO THE FMS. ATC ASKED US WHAT OUR ORIGINAL INSTRUCTION WAS; AND AT THAT TIME WE REALIZED WE WEREN'T GOING TO BE ABLE TO MAKE THE ASSIGNED XING. ATC ISSUED AN EXPEDITED DSCNT TO FL250. THE CAPT WHO HAD ORIGINALLY XCHKED MY INFO WAS NOT AWARE THAT I HAD RE-INPUT THE INFO; AND THEREFORE WAS NOT ABLE TO CATCH MY MISTAKE. IMPROVED COM BTWN PLTS DURING FMS INPUT. I BELIEVE IT WAS MY COMPLACENCY THAT CAUSED ME NOT TO ALERT THE CAPT TO MY CHANGED INPUT.

Data retrieved from NASA's ASRS site as of May 2009 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.

EMB145 first officer fails to make crossing restriction due to incorrect FMC entry and failure to have nfp check it.