Captain reported that some fleet aircraft in the company do not display terrain warning indication.

Attributes
ACN	1407574
Time
Date	201612
Local Time Of Day	1201-1800
Place
Locale Reference	ZLA.ARTCC
State Reference	CA
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Component
Aircraft Component	Indicating and Warning - Flight & Navigation Systems
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Total 13900
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Other / Unknown

Narrative:

While at the gate in [an] A319 basic aircraft we noticed that with the terr pb (push button) selected; no terr was displayed on the nd (navigational display). Then while enroute to lax there were no terr indications while flying over the mountainous; western us (rocky mtns; las vegas area; RIIVR3 arrival over big bear ca and the ILS 24R at lax). We were unable to find any description of a basic aircraft terr display in [the operation manual]. This was the third airplane we flew during this sequence with the same indications (no terr displayed on the nd with the terr on pb selected on). We tried various setting of screen brightness to no avail. The lack of indications were present in flight and at the gate.

Original NASA ASRS Text

Title: Captain reported that some fleet aircraft in the company do not display terrain warning indication.

Narrative: While at the gate in [an] A319 basic aircraft we noticed that with the TERR PB (Push Button) selected; no TERR was displayed on the ND (Navigational Display). Then while enroute to LAX there were no TERR indications while flying over the mountainous; western US (Rocky Mtns; Las Vegas area; RIIVR3 arrival over Big Bear CA and the ILS 24R at LAX). We were unable to find any description of a basic aircraft TERR display in [the operation manual]. This was the third airplane we flew during this sequence with the same indications (no TERR displayed on the ND with the TERR ON PB selected ON). We tried various setting of screen brightness to no avail. The lack of indications were present in flight and at the gate.

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.