L'assenza di carburante e' alquanto improbabile ,a meno che non si sia verificata una situazione come quella dell'ATR dove le indicazioni non facessero presupporre tale situazione.
A LHR non e' inusuale sentire qualcuno che richiede priorita' all'atterraggio per low fuel soprattutto quando c'e' maltempo/rush hour (praticamente sempre).
Se cosi fosse stato avrebbero dichiarato tale situazione ed invece tutto sembrava normale fino al corto finale.
Per quanto riguarda i PED vi rimando a
QUESTO documento CAA che e' esaustivo e rivelatore per molti aspetti. Vi lascio anche un breve estratto di sotto:
6 Observations and Conclusions
6.1 The tests revealed various adverse effects on the equipment performance from simulated cellphone interference. Although the equipment demonstrated a satisfactory margin above the original certification criteria for interference susceptibility, that margin was not sufficient to protect against potential cellphone interference under worst case conditions.
6.2 As recorded on the worksheets reproduced in Annex 1, the following anomalies were seen at interference levels above 30 volts/metre, a level that can be produced by a cellphone operating at maximum power and located 30cms from the victim
equipment or its wiring harness.
• Compass froze or overshot actual magnetic bearing.
• Instability of indicators.
• Digital VOR navigation bearing display errors up to 5 degrees.
• VOR navigation To/From indicator reversal.
• VOR and ILS course deviation indicator errors with and without a failure flag.
• Reduced sensitivity of the ILS Localiser receiver.
• Background noise on audio outputs.
6.3 Most anomalies were observed at 1719MHz.
6.4 For the general case, and depending on the other aids available to the flight crew, the consequences of the observed anomalies could include crew distraction, confusion, and loss of confidence in the equipment. The degraded navigation precision could result in an inability to meet required navigation performance with potential adverse effects on aircraft separation and terrain clearance.