Crj-700 flight crew reported receiving a ground proximity warning on approach to phl.

Attributes
ACN	1596518
Time
Date	201811
Local Time Of Day	1201-1800
Place
Locale Reference	PHL.Airport
State Reference	PA
Environment
Flight Conditions	IMC
Light	Night
Aircraft 1
Make Model Name	Regional Jet 700 ER/LR (CRJ700)
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Events
Anomaly	Inflight Event / Encounter CFTT / CFIT

Narrative:

During approach to runway 9R at phl; crew was assigned 4000 ft. Altitude and vectors to intercept localizer to runway 9R. After descending and establishing at 4000 ft. And the assigned vector; ATC instructed us to descend [to] 3000 heading 120 to intercept the localizer. As we descended from 4000 to 3000 around 3200; a GPWS alert of 'terrain' came on. Pilot flying disconnect ap (autopilot); seconds after that another GPWS alert 'pull up' was received; PF (pilot flying) initiated escape maneuver and initiated climbed. Pilot non-flying contacted ATC and advised we had a GPWS alert and we were climbing. ATC asked want altitude do we want to level off; PF said 4000 and ATC assigned us 4000. ATC asked if we can continue the approach from that altitude to which PF indicated that yes we can intercept the localizer and GS. PF continued the approach hand flown to intercept the ILS and landed uneventfully.

Original NASA ASRS Text

Title: CRJ-700 Flight Crew reported receiving a Ground Proximity warning on approach to PHL.

Narrative: During approach to Runway 9R at PHL; Crew was assigned 4000 ft. altitude and vectors to intercept localizer to Runway 9R. After descending and establishing at 4000 ft. and the assigned vector; ATC instructed us to descend [to] 3000 heading 120 to intercept the localizer. As we descended from 4000 to 3000 around 3200; a GPWS alert of 'TERRAIN' came on. Pilot Flying disconnect AP (Autopilot); seconds after that another GPWS alert 'PULL UP' was received; PF (Pilot Flying) initiated escape maneuver and initiated climbed. Pilot Non-Flying contacted ATC and advised we had a GPWS alert and we were climbing. ATC asked want altitude do we want to level off; PF said 4000 and ATC assigned us 4000. ATC asked if we can continue the approach from that altitude to which PF indicated that yes we can intercept the LOC and GS. PF continued the approach hand flown to intercept the ILS and landed uneventfully.

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.