Air carrier first officer reported the tower directed a go-around due to FOD on the runway; followed...

Narrative:

Weather at mso was VFR. After turning final to runway 29 at mso; tower directed us to go around due to foreign object debris (FOD) reported on the runway by preceding aircraft taking off. A go around was performed and runway heading was given by tower along with altitude at pilot's discretion. An altitude of 4;800 feet MSL was chosen (traffic pattern altitude). We were directed to follow preceding traffic; so flaps 30 was selected to slow behind them and also to shorten turn radius. After turning downwind; we received an egpws 'terrain; terrain; pull up' warning and a positive pull up was performed to stop the warning (climb of about 50 feet). Positive visual separation was maintained prior to and during the event due to good weather. The visual pattern was continued to a successful landing to runway 29.caused by high terrain airport; poor ATC direction on go around; unfamiliarity with airport (first time at mso).

Original NASA ASRS Text

Title: Air carrier First Officer reported the Tower directed a go-around due to FOD on the runway; followed by a VFR pattern at 4800 feet causing a GPWS terrain warning.

Narrative: Weather at MSO was VFR. After turning final to Runway 29 at MSO; tower directed us to go around due to foreign object debris (FOD) reported on the runway by preceding aircraft taking off. A go around was performed and runway heading was given by tower along with altitude at pilot's discretion. An altitude of 4;800 feet MSL was chosen (traffic pattern altitude). We were directed to follow preceding traffic; so flaps 30 was selected to slow behind them and also to shorten turn radius. After turning downwind; we received an EGPWS 'Terrain; Terrain; Pull Up' warning and a positive pull up was performed to stop the warning (climb of about 50 feet). Positive visual separation was maintained prior to and during the event due to good weather. The visual pattern was continued to a successful landing to Runway 29.Caused by high terrain airport; poor ATC direction on go around; unfamiliarity with airport (first time at MSO).

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.

Attributes
ACN	1428633
Time
Date	201702
Local Time Of Day	1801-2400
Place
Locale Reference	MSO.Airport
State Reference	MT
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Medium Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	ATC Issue All Types Inflight Event / Encounter CFTT / CFIT

Air carrier first officer reported the tower directed a go-around due to FOD on the runway; followed by a VFR pattern at 4800 feet causing a GPWS terrain warning.