Date: 201506
Local time of day: 0001-0600
Location: GEG.Airport, WA
Flight conditions: VMC
Light: Daylight
Aircraft: B737 Undifferentiated or Other Model
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Initial Approach
Airspace: Class C GEG
ATC / advisory: Tower GEG
Reporter organization: Air Carrier
Reporter function: Captain; Pilot Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Human factors: Confusion; Situational Awareness
Second reporter function: First Officer; Pilot Not Flying
Anomaly: Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence; Inflight Event / Encounter Unstabilized Approach
Detector: Person Flight Crew
When detected: In-flight
Result: Flight Crew Became Reoriented
Contributing factors: Human Factors
Primary problem: Human Factors

Narrative: While I have flown into GEG before; it is not an airport that I see on a regular basis. When I have; however; Runway 3-21 has always been the runway in use. Not today; the runway in use is 25. There is no D-ATIS for GEG; so we got the latest METAR via ACARS. While there were light showers in the area; the weather at the airport called for good visibility; light winds; and some high thin cloud coverage. We briefed a visual to Runway 25 with the RNAV RNP Z as a backup for guidance. This was accomplished at our cruise altitude. As we neared the airport we got the ATIS on the appropriate frequency. The Descent and Approach Checklists were accomplished accordingly. We began to configure with flaps about 12 miles from the runway. Approach Control vectored us to the east around some showers and ultimately towards the airport for a visual. As we proceeded inbound; we deleted the fixes on the RNAV approach which we had passed and eventually we were left with WARKI; which was the final approach point on that approach. Once we were well clear of the showers; Approach asked if we had the airport in sight; which we did; and we were cleared for the visual approach. The crossing altitude for WARKI was placed in the altitude alerter and everything looked good on the map display as well as visually. Only one problem; looking at the runway; we are high and fast. For some reason I'm of the belief that WARKI is about five miles or so and 1500 FT above the runway end; like most final fixes are. It's not. In reality; it's three miles and slightly more than 1000 FT AGL. While we're not at WARKI; we are close to the field. We configure with the gear and more flaps; but ultimately realize as we're turning final near WARKI that this won't work. The only other aircraft in the vicinity was a flight check aircraft; but they're nowhere near the airport yet. So we asked for a left 360; which the Tower approved. At some point in our careers; we've all asked ATC for S turns or a 360 to lose altitude and that generally works very well. We had no weather; terrain; or traffic issues so this seemed like a good idea. Slight problem. I'm still thinking WARKI; which we're essentially circling around; is 1500' above and five miles from the airport. As we're in the turn; F/O advises me that we're below 1000 FT AGL. We're about 900 FT; level; and configuring our flaps to 30; and know where we are in relation to the runway. At this point; the safest course of action with the least amount of task and mental loading was to continue our turn; roll out on final; confirm we were stabilized; and land; which we did; uneventfully. After we landed; we both had the same thoughts. We should have gone around. This was shall we say 'out of the box thinking;' which has worked in the past elsewhere. Did it work? Yes. Was it safe? We feel it was. Was it what we should've done? No. We didn't try to land when we realized our initial approach was not viable. But; rather than this solution; we simply should've gone around. That would've been the best choice.I've been flying commercially for 37+ years. There isn't a trip that goes by where I don't learn something. We're at an airport that I visit infrequently; conducting a visual approach to a runway I've never landed on before; and using guidance from a procedure I've never used here. Sometimes we can't rely on past experience in which 360's; S turns; and other solutions have worked well. Next time; and yes one day there will be a next time; we will be going around.


Second narrative: We briefed a visual approach to Runway 25. We backed it up with the RNAV (RNP) Z Runway 25. The Captain did a thorough brief and I felt we were prepared for the approach. Once we got the airport in sight and were cleared for the approach; the Captain went direct WARKI; which is the final approach fix on the RNAV Approach. He began slowing and configuring; but didn't get configured in time. I mentioned that we were approaching 1000 and he said something to the effect that he needed a turn. I asked Tower for a 360 and they authorized a left 360. I'm not sure; but I believe we were at flaps 15 by that time and in my mind; we were still just above 1000 FT. However; in the turn; I realized we had dropped down just below 1000 FT and told the Captain. We both agreed the best course at that point was to continue the turn and finish configuring to intercept final stabilized. Our landing was uneventful. Our intent was to not try to salvage a bad situation by flying below 1000 FT unstabilized and quite possibly landing long and fast. Rather; we made a snap decision to take what seemed like a reasonable and safe course of action. In retrospect; a go-around would have been the obvious best course of action. If I had it to do over again; I would go around. S Turns or 360's on final have worked in the past; but never to configure and never at or below 1000 FT. It was not intentional; and I certainly learned a good lesson. I need to be more spring-loaded to go around than to try to find a way to 'make it work.' Also; as Pilot Monitoring; I need to be more inclined to intervene verbally.


Synopsis: B737 Flight Crew reports being high and fast on a visual approach and elects to make a 360 with ATC's approval. During the maneuver the aircraft gets below 1000 feet AGL. The approach is continued to landing. Both pilots agree a go around was in order.