Issue 407 | December 2013 |
ASRS continues to receive reports in which Flight Crews appear to focus on the autoflight system to the extent that situational awareness is reduced, sometimes during critical phases of flight. In the following reports, awareness of the aircraft’s actual flight path seems to have been compromised by:
In many of these reports, workload, confusion, unexpected situations, distractions and fatigue are seen as factors that may exacerbate autoflight related issues.
Autoflight human factor issues are a particular concern when both pilots lose situational awareness. This may occur with greater frequency as flight crews are trained primarily or exclusively in the more passive task of autoflight system management. ASRS reports suggest that the ability to maintain real world awareness can be eroded by over-reliance on the highly dependable programmed control of the aircraft. With that in mind, perhaps the following incidents should be viewed as the result of human nature rather than human error.
Telling It Like It Is — One Captain’s Opinion
A confusing departure chart and what the Captain characterized as over-reliance on automation resulted in a track deviation and traffic conflict for this air carrier Flight Crew. The Captain elaborates on his assessment of automation dependency and cluttered charts.
■ Two major points here: 1) I’m tired of flying around with people who are predisposed to let LNAV and automation lead them around by the nose and, 2) charts have gotten ridiculous….
It was the First Officer’s leg. We were late, but I really try to provide a laid back, don’t rush CRM posture. We did all the things we were supposed to do, but I guess we didn’t spend 15 minutes reading every word on the NEWARK ONE 22L/R departure page. This chart is a triple folded, 10-inch wide encyclopedia. The important piece of information is what to do on takeoff, yet it’s practically hidden in a box towards the bottom of the page…. When you consider the congested airspace in that area, it’s critical that you don’t turn the wrong way after takeoff, but that’s exactly what we did. Why we did that, I don’t know. We’re human I guess.
At 400 feet the First Officer said, “LNAV.” I furrowed my brow…and thought, “Okay, maybe I missed something.” But I went ahead and punched LNAV and looked down at the LEGS page on my side and saw LANNA at the top. I said something like, “That doesn’t sound right.” Meanwhile our VSI was pegged because we were climbing like a fighter since we only had twenty-some people onboard.
While we were in the right turn, obviously towards the wrong place…I’m feeling like this is not going well while the First Officer is climbing and turning right toward an aircraft crossing our nose from left to right. He’s still a bit away, but…this looks like it’s going to be unusually close. I say…“Watch that guy,” pointing at the traffic, when I hear Departure say, “Did Tower give you a heading?” All my senses now tell me my first gut feeling was correct and I answer, “Ah, we’re checking,” while Departure rapidly rattles off, “Stop at 4,000 feet; turn left to 270; traffic 12 o’clock.” I told him we had the traffic in sight and he says, “You guys need to be careful.”
So, back to point number one. When I first was blessed to be a part of this fine group of pilots, the Captains I flew with all told me, “Never trust that box.” And we didn’t. We used our brains to fly the airplane. Now however, we bow to that thing! This is the second time this has happened to me and yes, of course it’s “my fault,” but both times it’s because [pilots] just let LNAV lead them around. These are not RNAV departures, they are ‘heading’ departures, but we’ve brainwashed everyone to think, “Just hit LNAV and it will be all right.” It’s not. Please don’t tell me, a “proper briefing” would’ve solved all this because we’ve reached briefing overload. [Pilots] are more worried about doing all the briefings than paying attention to actually flying the airplane….
The First Officer didn’t see the traffic because he was face down in the instrument panel following the FD LNAV guidance. When all this happened, his first reaction was to put on the autopilot and start reading the departure chart to see where we screwed up. I had to ask him to let it go until we got higher.
Red Eye Wake Up Call
Reports from the Captain and First Officer recount what can happen when both crewmembers of an air carrier jet focus their attention exclusively on the automation during an approach in IMC. Awareness of the aircraft’s current flight dynamics (altitude, heading, airspeed, attitude, etc.) and of the pertinent aspects of the approach, appear to have become secondary notions rather than primary elements of flying the aircraft. Cross-reference to raw data is not mentioned in either report.
From the First Officer’s report on the same incident:
■ I cannot believe we both missed something so obvious, but we did…. We both looked at the approach and noted that VNAV wouldn’t work since the intermediate fix had an altitude of 4,000 feet which we were already below. I then selected Approach mode and we both acknowledged approach mode…. We had previously intercepted the LOC…. Approaching [the Final Approach Fix] something didn’t feel right and I started re-checking/cross checking the MCP when the “Low Altitude” alert was issued by ATC. We accomplished a missed approach at this point.
Managing the Automation — More or Less?
An A320 First Officer’s focus on managing the automation led to an approach deviation that prompted a warning from the Captain and triggered ATC low altitude alerts. Proper programming and proper use of the automation might have eliminated the problems in this incident, but errors can be made and systems can malfunction. Situational awareness will save the day (or the dark and stormy night).
“We Were Supposed To Be Descending”
It is interesting to note that situational awareness, in this case knowing that the aircraft was climbing when it should have been descending, was not mentioned by the reporter as an element in preventing future deviations. The B737-700 Captain focused instead on automation as the sole remedy.
ASRS Alerts Issued in October 2013 | |
---|---|
Subject of Alert | No. of Alerts |
Aircraft or Aircraft Equipment | 22 |
Airport Facility or Procedure | 6 |
ATC Equipment or Procedure | 3 |
TOTAL | 31 |
October 2013 Report Intake | |
---|---|
Air Carrier/Air Taxi Pilots | 4,475 |
General Aviation Pilots | 1,185 |
Controllers | 647 |
Flight Attendants | 358 |
Mechanics | 175 |
Military/Other | 116 |
Dispatchers | 109 |
TOTAL | 7,065 |