B737 first officer reported the bur RNAV runway 15 approach possibly violates whp airspace.

Narrative:

I flew the RNAV visual to runway 15. While just lining up for final past goblt; I heard a GA aircraft check in with socal reporting he just departed whp. Knowing I was roughly abeam whp I looked down to TCAS and saw him 200 ft lower than us slightly behind maybe a mile or less. I tried to give a couple glances out the window to spot him; but was not able to see him and I returned my attention to flying the remainder of the approach. We never got a TCAS or a traffic call from ATC; but it kind of made me go 'hmm'.a few days after; I just happened to get a call from a flight instructor friend of mine that teaches out of whp. He called to discuss this very approach. He claims that the whp tower claims as well that this approach violates their class D airspace. Whp has a great deal of student pilots and they are concerned about this approach for wake turbulence both from GA aircraft arriving from and departing to the north (newhall pass) and for runway 12 departures. Just thought I'd pass this concern along.

Original NASA ASRS Text

Title: B737 First Officer reported the BUR RNAV Runway 15 Approach possibly violates WHP airspace.

Narrative: I flew the RNAV Visual to Runway 15. While just lining up for final past GOBLT; I heard a GA aircraft check in with SoCal reporting he just departed WHP. Knowing I was roughly abeam WHP I looked down to TCAS and saw him 200 ft lower than us slightly behind maybe a mile or less. I tried to give a couple glances out the window to spot him; but was not able to see him and I returned my attention to flying the remainder of the approach. We never got a TCAS or a traffic call from ATC; but it kind of made me go 'hmm'.A few days after; I just happened to get a call from a flight instructor friend of mine that teaches out of WHP. He called to discuss this very approach. He claims that the WHP Tower claims as well that this approach violates their Class D airspace. WHP has a great deal of student pilots and they are concerned about this approach for wake turbulence both from GA aircraft arriving from and departing to the north (Newhall Pass) and for Runway 12 departures. Just thought I'd pass this concern along.

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	1461750
Time
Date	201706
Local Time Of Day	1801-2400
Place
Locale Reference	BUR.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 250
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy