Air carrier first officer reported missing an altitude crossing restriction while on arrival.

Attributes
ACN	1751272
Time
Date	202007
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Component
Aircraft Component	FMS/FMC
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 20 Flight Crew Type 5000
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Undershoot Deviation - Procedural Clearance

Narrative:

Given crossing restriction of zzzzz at 280 knots at FL250. Captain had difficulty getting 280 knots at fix in ZZZZZ1. Finally glad to put the speed into the descent page because FMS would not allow it on flat plan page. Yet aircraft was in LNAV/VNAV path. The next clue was ZZZ approach asking us if we had a crossing restriction and we fessed up. He gave us a descent to FL190 and did not sound concerned and didn't have to vector any other aircraft. We are both retiring in a few weeks and that is proving to be a bigger distraction than anticipated.

Original NASA ASRS Text

Title: Air carrier First Officer reported missing an altitude crossing restriction while on arrival.

Narrative: Given crossing restriction of ZZZZZ at 280 knots at FL250. Captain had difficulty getting 280 knots at fix in ZZZZZ1. Finally glad to put the speed into the Descent page because FMS would not allow it on flat Plan page. Yet aircraft was in LNAV/VNAV PATH. The next clue was ZZZ Approach asking us if we had a crossing restriction and we fessed up. He gave us a descent to FL190 and did not sound concerned and didn't have to vector any other aircraft. We are both retiring in a few weeks and that is proving to be a bigger distraction than anticipated.

Data retrieved from NASA's ASRS site 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.