B757 Flight Crew reports being cleared for push back by Ramp Control; only to be countermanded by the maintenance taxi crew of the aircraft passing behind them. Non standard phraseology is used causing some confusion for the reporters.

Date: 2011-09 · Aircraft: B757-200 · Phase: taxi

Anomalies: conflict-ground-conflict|less-severe|deviation-discrepancy-procedural-other-unknown|ground-event-encounter-other-unknown

Synopsis

B757 Flight Crew reports being cleared for push back by Ramp Control; only to be countermanded by the maintenance taxi crew of the aircraft passing behind them. Non standard phraseology is used causing some confusion for the reporters.

Narrative

I made as standard pushback clearance call and there was a slight delay; but then I received a clearance. I repeated the clearance back carefully; but immediately heard non-standard communication on freq that was confusing and could have been mistaken for bleed through or a switchology error. I then realized someone was questioning our pushback clearance on the ramp frequency; and then distinctly heard; 'Don't Push; Don't Push.' I relayed this to the Cap't. To my recollection I again asked if we were cleared to push; and thought I heard another positive pushback clearance from the ramp controller. But again it was immediately followed by non-standard transmissions from another party and used words such as; 'What are you stupid?'; and also words that questioned the controller's qualifications such as; 'How can you be qualified to be a tower controller?'. These are not direct quotes; I just want to establish the tone in my report. I asked them 'who' they were and the response was 'Maintenance Delivery.' Once I acquired a visual on the aircraft; and they were at the gate; we again requested clearance for pushback; which was granted. An uneventful pushback was accomplished. At NO time were the brakes ever released prior to this because of the confusion of the situation. Also; the Cap't asked his tug driver if the aircraft behind us was in sight earlier; and he stated that it was. Not entirely related to this incident; I believe the Captain should ALWAYS be the party getting the PB clearance directly. I realize there are safety issues involved with the tug driver; but in my opinion; these are not as significant as the importance of getting a correct clearance. At a minimum; the Captain should at least MONITOR the receipt of the PB clearance directly from ATC. This avoids the long chain of controller; to F/O; to Capt; to tug driver sequence for receipt of clearance.

Second reporter narrative

When First Officer called for pushback; I heard him repeat back to the ramp controller 'OK; cleared to push to the south line'; then he got a questioning look on his face and told me to NOT push. I had not yet even told the tug operator anything; and the brakes were still set. The First Officer then asked the ramp controller if he could confirm that we were actually cleared to push; and after listening to the response; the First Officer told me that I should listen to the ramp frequency. When I raised the volume to do that on my radio; I heard something to the effect of 'what are you doing in the tower; are you stupid?' This might be partially paraphrased; but the question 'are you stupid' is verbatim. Apparently an airplane was being delivered to the gate by maintenance; immediately next to our gate. The geometry of the gates is such that if an airplane is arriving at that gate there is a potential conflict and chance for collision with an airplane pushing back from our gate. It seems that it was the operator of the aircraft arriving at the adjacent gate; who had previously been cleared in; who made these inappropriate comments on the ramp frequency. To confirm; our brakes were never released and we did not start the pushback; until we confirmed about 4 times with the ramp controller and our tug operator; that the ramp was clear behind us. The operator of the aircraft arriving at the adjacent gate; apparently maintenance; did the correct thing by making us aware that there was a potential conflict; as he was not yet fully parked at the gate. However; his use of the radio was unprofessional and inappropriate. The ramp controller told us that his supervisor would be pulling the tapes for review.

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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.