A hcf controller reported of a spacing problem which led to a go around. When the aircraft was turne...

Attributes
ACN	1349221
Time
Date	201604
Local Time Of Day	0601-1200
Place
Locale Reference	HCF.TRACON
State Reference	HI
Environment
Light	Daylight
Aircraft 1
Make Model Name	Widebody Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Other Instrument Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Widebody Low Wing 4 Turbojet Eng
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Flight Plan	IFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 5
Person 2
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 5
Events
Anomaly	ATC Issue All Types Airspace Violation All Types Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT

Narrative:

Aircraft X was on an ILS runway 2 to ogg they were following aircraft Y. The aircraft Y was on final and instructed to keep speed up on the approach showing 170kts ground speed. At the time the aircraft Y was switched to the tower about 11 mile out aircraft X was turning base with about 6 miles in trail slowing to 170kts on the ILS to runway 2 with this about of space and adequate speed adjustments there should have been enough space on final. Shortly after switching the aircraft Y to the tower ogg tower called for 2 departures ogg tower only needs to call rolling calls this is class C airspace; a few moments later the aircraft Y slows to 90 knots over the ground with this drastic 80 kt speed reduction I didn't not think that I could slow the second aircraft enough to maintain spacing so I climbed aircraft X to 5;000 and fly present heading to resequence them on a downwind I thought I was clear of all of the mvas at 5;000 but just to the right of the airport the MVA jumps from 2;200 to 6;000 so I might have encroached the 6;000 MVA.in the LOA hcf has with ogg tower it states that the tower must maintain the integrity of the sequence in this situation if felt like the tower slowed the aircraft Y to an unreasonably slow speed in order to get their departures out caused the compression that made me believe that I would lose separation on final so I broke the second aircraft out.

Original NASA ASRS Text

Title: A HCF Controller reported of a spacing problem which led to a go around. When the aircraft was turned it entered an airspace of higher altitude; resulting in an airspace deviation.

Narrative: Aircraft X was on an ILS Runway 2 to OGG they were following Aircraft Y. The Aircraft Y was on final and instructed to keep speed up on the approach showing 170kts ground speed. At the time the Aircraft Y was switched to the tower about 11 mile out Aircraft X was turning base with about 6 miles in trail slowing to 170kts on the ILS to runway 2 with this about of space and adequate speed adjustments there should have been enough space on final. Shortly after switching the Aircraft Y to the tower OGG tower called for 2 departures OGG tower only needs to call rolling calls this is Class C airspace; a few moments later the Aircraft Y slows to 90 knots over the ground with this drastic 80 kt speed reduction I didn't not think that I could slow the second aircraft enough to maintain spacing so I climbed Aircraft X to 5;000 and fly present heading to resequence them on a downwind I thought I was clear of all of the MVAs at 5;000 but just to the right of the airport the MVA jumps from 2;200 to 6;000 so I might have encroached the 6;000 MVA.In the LOA HCF has with OGG tower it states that the tower must maintain the integrity of the sequence in this situation if felt like the tower slowed the Aircraft Y to an unreasonably slow speed in order to get their departures out caused the compression that made me believe that I would lose separation on final so I broke the second aircraft out.

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.

A hcf controller reported of a spacing problem which led to a go around. When the aircraft was turned it entered an airspace of higher altitude; resulting in an airspace deviation.