South African Transport and Allied Workers' Union leader has been accused of an inappropriate relationship with an employee.
Countrywide strikes by mining, transport and metalworkers has weakened the rand and eroded investor confidence.
Workers from the automotive industry will meet to discuss revising pay demands as the strike involving 30 000 people enters its 11th day.
"Unfounded claims" by Satawu that its strike disrupted SAA operations are false, says the airline, adding that its contingency plans were effective.
Acsa will not permit demonstrations on airport premises during a strike by Satawu members at airline SAA's technical department.
About 4 000 South African Transport and Allied Workers' Union members employed by SAA will strike on Thursday, says the union.
Satawu union members marched through the streets of Jo’burg to demand a wage increase for bus drivers.
Bus drivers have embarked on a national wage strike and demanded an 18% pay increase, says Satawu.
A wage deal has been signed at the road freight bargaining council's offices in Johannesburg, ending a three-week long truck drivers' strike.
The impact of strikes in mining and transport will have long-term effects on the economy that cannot be quantified yet, writes Faranaaz Parker.
Three transport unions have agreed to abandon their industrial action but Satawu, which represents about 28 000 workers, says it will continue.
With no end in sight for the transport workers strike, observers have warned that dire economic effects would be felt as it enters its second week.
Many workers now believe violence is justified, indeed necessary. Some, notably in the transport union Satawu.
Ekurhuleni emergency services have been placed on high alert after violent protests by striking truck drivers resulted in injuries on Wednesday.
Satawu president Ephraim Mphahlele has officially resigned from his union to join a splinter group, as factional battles ahead of Mangaung heats up.
Trade unions Satawu and Numsa have welcomed the suspension of pay increases for chief executives and board members of parastatals.
The cleaning sector is planning to go on strike on Monday after wage negotiations with employers failed, Cosatu has announced.
Satawu has agreed to a wage deal, putting an end to the week-long road freight sector strike, it said on Monday.