Date: 201812
Location: PHX.Airport, AZ
Light: Night
Aircraft: B737-700
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Takeoff / Launch
Reporter organization: Air Carrier
Reporter function: Flight Attendant In Charge
Reporter qualification: Flight Attendant Current
Human factors: Time Pressure; Situational Awareness; Confusion; Training / Qualification; Communication Breakdown
Anomaly: Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown
Detector: Person Flight Attendant
When detected: Taxi
Contributing factors: Company Policy; Human Factors; Procedure; Manuals
Primary problem: Human Factors

Narrative: I was flying as the A Flight Attendant. We had not yet completed our emergency demonstration when we received the single hi-lo chime from the flight deck that we were being cleared for departure. I knew that our procedure in these short taxis was to do the oxygen demonstration after takeoff. However; the Captain had communicated to us that we were expecting turbulence after takeoff; and that he would call us when it was safe to get up. Because of this; I continued with the emergency PA. I then began my final walkthrough; as it was my understanding that this always needs to be done. I had always seen other A flight attendants complete our pre-takeoff procedures even after we had received the single chime. I had reached the back half of the cabin when we started to accelerate into our takeoff. I was able to quickly get into an open seat and fasten my seatbelt; was not hurt in any way; and I returned to my jumpseat when it was safe to do so. Passengers and my fellow flight attendants saw this happen. Our C Flight Attendant was still in my field of view at the front of the cabin after I took a seat; and she rushed to take her jumpseat after we began accelerating into our takeoff. I debated calling the pilots during cruise to let them know that this had happened; but I was shaken up and upset and decided against it. I did bring it up with him while we deplaned at our destination. He was apologetic; and we both agreed that more communication on both of our parts would have benefited. The crew was not told that we would have a short taxi; and I did not communicate with the pilots that we were not ready to take off after we had received the chime. In my experience; it has always seemed like standard operating procedure for the pilots to wait for the A flight attendant to make the 'cleared for departure' PA before initiating takeoff; and if it is not made; for a call to be made to see what was going on in the cabin. The Captain had told me that ATC chatter had interfered with his ability to hear us making our PAs; and he thought we had made the 'cleared for departure' PA. Our C Attendant did ultimately make it after we were already in the process of taking off; and I was in a passenger seat. I consulted my manual when I got home; and did see where it says to signal the flight deck with 2 chimes and inform the pilots that we had not yet finished our emergency demonstration. Then; finish the oxygen demonstration after take off but below 25;000 ft. Again; that was not an option in this case because it was communicated to us that turbulence was expected on our ascent. Then; the manual says to exercise discretion on conducting the final walk through. I had elected to start my walk through after we had received the single hi-lo chime because I was under the impression that the walk through was always required prior to takeoff; and I do not recall being trained to not do it in any circumstances. Again; I had always finished all surface movement procedures before making the 'cleared for departure' PA; and had seen other A flight attendants do the same; even after receiving a hi-lo chime. And; I had never seen a plane take off without a flight attendant making the 'cleared for departure' PA; which is what happened in this case. Ultimately; this was a learning experience that got me to become more familiar with the manual's details in an unfamiliar situation that I had not yet encountered. In the future; I will communicate with the pilots if we are not ready for departure when we receive a hi-lo chime; and determine what procedures should be completed prior to taking my seat for departure. In my case; it was probably something that needed to happen for me to learn. I did not recall learning to not complete my walk through if we had received a hi-lo chime from the flight deck. If one has never been in a situation like this; the manual's language to 'exercise discretion on conducting the final walk through' does not easily connect to areal world situation where that discretion should be applied. It never would have occurred to me that not 'exercising discretion' could result in me being caught in the middle of the cabin during takeoff. Now that I have referred to the relevant section of the manual after this experience; I am prepared to handle this situation correctly in the future; both through more communication with the flight deck as well as my 'discretion.'




Synopsis: B737 Flight Attendant reported not immediately seating after receiving pre-takeoff chime notification.