B787 flight crew reported a GPWS alert when the gear had not been lowered when requested.

Attributes
ACN	1590332
Time
Date	201810
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B787 Dreamliner Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Total 18317 Flight Crew Type 772
Person 2
Function	Pilot Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 120 Flight Crew Total 25300 Flight Crew Type 1376
Events
Anomaly	Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Other / Unknown Inflight Event / Encounter CFTT / CFIT

Narrative:

Pilot monitoring (pm) (first officer) did not hear pilot flying (PF) (captain) request for gear down; but did hear and comply with request to move flaps from 20 to 25. Subsequently; got warning horn. Pm then realized that the gear had not been extended; queried the PF about the gear; [and] then extended the gear on PF direction. Aircraft was in night VMC; and as extending the gear corrected the issue (aircraft was still above 1;500 AGL); the PF decided to continue the landing.

Original NASA ASRS Text

Title: B787 flight crew reported a GPWS alert when the gear had not been lowered when requested.

Narrative: Pilot Monitoring (PM) (First Officer) did not hear Pilot Flying (PF) (Captain) request for gear down; but did hear and comply with request to move flaps from 20 to 25. Subsequently; got warning horn. PM then realized that the gear had not been extended; queried the PF about the gear; [and] then extended the gear on PF direction. Aircraft was in night VMC; and as extending the gear corrected the issue (aircraft was still above 1;500 AGL); the PF decided to continue the landing.

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.